FIRAS Explanatory Supplement Appendix G Concatenated Primary and Extension Headers for FIRAS FITS Format Files This Appendix contains concatenated primary and extension headers for the following FIRAS FITS format files: Coadded Calibration Interferograms Coadded Sky Interferograms Calibrated Calibration Spectra Calibrated Sky Spectra Differential Calibration Spectra Differential Sky Spectra Destriped Sky Spectra Coadd-Based Zodiacal Light Model Pixel-Based Zodiacal Light Model DIRBE Gradient Kernel Physical Stripes Orthogonal Stripes C Vector A Vector Covariance Matrix Chi-Squared Calibration Model Solution Calibration Errors Combined Calibration Errors Model Selection Errors Low Frequency Line Profiles High Frequency Line Profiles Low Frequency Line Map High Frequency Line Map Dust Spectrum Map CMBR Temperature Map While the number of channels and scan modes varies for each dataset, the header for only one channel and scan mode in each dataset is included in this Appendix. -------------------------------------------------------------------------------- Coadded Calibration Interferograms SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'CAL-IFG' / Coadded calibration interferograms EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial variance COMMENT / point in GHz DELTA_NU= 13.604162 / Optical frequency interval between variance COMMENT / points in GHz NUM_FREQ= 43 / Number of frequency points in variance COMMENT / with good data PEAK_POS= 360 / Interferogram peak position FFT_LENGTH= 640 / Length of Fast Fourier Transform used END COMMENT TIMVERSN= 'OGIP/93-003' / OGIP memo number where the convention COMMENT / is described COMMENT The times reported in this file are atomic seconds elapsed COMMENT since 00:00:00 UTC, 1 January 1981. Time information is COMMENT recorded in a manner consistent with the convention specified COMMENT in OGIP/93-003 with the understanding that time is counted COMMENT in atomic seconds and the origin of time (MJDREF) is quoted COMMENT in ephemeris MJD. TIMESYS = '1981.00' / time system (same as IRAS) MJDREFI = 44605 / Integer portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 MJDREFF = 0.00059240741 / Fractional portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 TIMEUNIT= 's ' / unit for TSTART, TSTOP, TIMEZERO = seconds TSTART = 280713605.000 / observation start time in TIMESYS system TSTOP = 306806405.990 / observation stop time in TIMESYS system COMMENT COMMENT COMMENT FIRAS Coadded Interferogram COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Instrument Attitude Information COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Ecliptic longitude, epoch 2000.0, in deg (0 -> 360) TFORM4='1E' TTYPE4='ECL_LON' / entire fieldname = ECL_LON OFFSET4=12 TUNIT4='deg' COMMENT Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90) TFORM5='1E' TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT OFFSET5=16 TUNIT5='deg' COMMENT Right ascension, in deg (0 -> 360) TFORM6='1E' TTYPE6='RA' / entire fieldname = RA OFFSET6=20 TUNIT6='deg' COMMENT Declination, in deg (-90 -> +90) TFORM7='1E' TTYPE7='DEC' / entire fieldname = DEC OFFSET7=24 TUNIT7='deg' COMMENT COMMENT Coadded Interferogram and Variances COMMENT COMMENT Coadded interferogram, in counts TFORM8='512E' TDIM8='(512)' TTYPE8='COADDED_' / entire fieldname = COADDED_IFG OFFSET8=28 TUNIT8=' ' COMMENT Variance of real part of coadd spectrum, in (MJy/sr)^2 TFORM9='210E' TDIM9='(210)' TTYPE9='REAL_VAR' / entire fieldname = REAL_VARIANCE OFFSET9=2076 TUNIT9='(MJy/sr)^2' COMMENT Variance of imaginary part of coadd spectrum, in (MJy/sr)^2 TFORM10='210E' TDIM10='(210)' TTYPE10='IMAG_VAR' / entire fieldname = IMAG_VARIANCE OFFSET10=2916 TUNIT10='(MJy/sr)^2' COMMENT Covariance between real and imaginary COMMENT parts of coadd spectrum, in (MJy/sr)^2 TFORM11='210E' TDIM11='(210)' TTYPE11='REAL_IMA' / entire fieldname = REAL_IMAG_VARIANCE OFFSET11=3756 TUNIT11='(MJy/sr)^2' COMMENT COMMENT Number and Times of IFGs COMMENT COMMENT Number of IFGs in coadd TFORM12='1J' TTYPE12='NUM_IFGS' / entire fieldname = NUM_IFGS OFFSET12=4596 TUNIT12=' ' COMMENT Glitch rate for coadded IFG, in glitches/s TFORM13='1E' TTYPE13='GLITCH_R' / entire fieldname = GLITCH_RATE OFFSET13=4600 TUNIT13='gl/s ' COMMENT Glitch rate weighted number of IFGs in coadd TFORM14='1E' TTYPE14='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS OFFSET14=4604 TUNIT14=' ' COMMENT Average data collection time in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM15='1D' TTYPE15='TIME' / entire fieldname = TIME OFFSET15=4608 TUNIT15='s' COMMENT Observation times of IFGs in the coadd; COMMENT in hundredths of days since ejection of the COMMENT FIRAS aperture cover at COMMENT 11:18.00 UTC, 21 November 1989 TFORM16='100J' TDIM16='(100)' TTYPE16='IFG_TIME' / entire fieldname = IFG_TIMES OFFSET16=4616 TUNIT16='d*100' COMMENT Flag indicating orphan IFGs, which occur COMMENT when a coadd is composed of only 1 or COMMENT 2 IFGs. In all other cases, the coadd COMMENT is composed of three or more IFGs; COMMENT applicable only to sky data. COMMENT Flag = 1 indicates 1 or 2 IFGS in the coadd; COMMENT flag = 0 indicates 3 or more IFGs in the coadd. TFORM17='1B' TTYPE17='ORPHANS' / entire fieldname = ORPHANS OFFSET17=5016 TUNIT17=' ' COMMENT COMMENT Template Information COMMENT COMMENT Number of templates subtracted from coadded IFG TFORM18='1J' TTYPE18='NUM_TEMP' / entire fieldname = NUM_TEMPLATES OFFSET18=5017 TUNIT18=' ' COMMENT Number of IFGS used in forming the templates TFORM19='1J' TTYPE19='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS OFFSET19=5021 TUNIT19=' ' COMMENT Flag indicating use of IFGs from neighboring COMMENT pixels in template formation (suitable COMMENT IFGs from 8 neighboring pixels); COMMENT applicable only to sky data. COMMENT Flag = 1 indicates neighbor IFGs were used; COMMENT flag = 0 indicates neighbor IFGs were not used. TFORM20='1B' TTYPE20='NEIGHBOR' / entire fieldname = NEIGHBORS OFFSET20=5025 TUNIT20=' ' COMMENT Number of IFGS from neighboring pixels used in COMMENT forming the templates; only for sky data TFORM21='1J' TTYPE21='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS OFFSET21=5026 TUNIT21=' ' COMMENT Observation times of IFGs used in template COMMENT formation; in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM22='100D' TDIM22='(100)' TTYPE22='TPL_TIME' / entire fieldname = TPL_TIMES OFFSET22=5030 TUNIT22='s' COMMENT Pixel numbers of IFGs used in templates TFORM23='100J' TDIM23='(100)' TTYPE23='TPL_PIXE' / entire fieldname = TPL_PIXELS OFFSET23=5830 TUNIT23=' ' COMMENT COMMENT Bolometer Bias and Voltage COMMENT COMMENT Commanded bolometer bias, in V TFORM24='1E' TTYPE24='BOLOM_BI' / entire fieldname = BOLOM_BIAS OFFSET24=6230 TUNIT24='V' COMMENT Bolometer readout voltage, in V TFORM25='1E' TTYPE25='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE OFFSET25=6234 TUNIT25='V' COMMENT COMMENT Instrument Temperatures COMMENT COMMENT External calibrator temperature, in K TFORM26='1E' TTYPE26='XCAL_TEM' / entire fieldname = XCAL_TEMP OFFSET26=6238 TUNIT26='K' COMMENT Internal calibrator temperature, in K TFORM27='1E' TTYPE27='ICAL_TEM' / entire fieldname = ICAL_TEMP OFFSET27=6242 TUNIT27='K' COMMENT Sky horn temperature, in K TFORM28='1E' TTYPE28='SKYHORN_' / entire fieldname = SKYHORN_TEMP OFFSET28=6246 TUNIT28='K' COMMENT Reference horn temperature, in K TFORM29='1E' TTYPE29='REFHORN_' / entire fieldname = REFHORN_TEMP OFFSET29=6250 TUNIT29='K' COMMENT Dihedral mirror temperature, in K TFORM30='1E' TTYPE30='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP OFFSET30=6254 TUNIT30='K' COMMENT Collimator mirror temperature, in K TFORM31='1E' TTYPE31='MIRROR_T' / entire fieldname = MIRROR_TEMP OFFSET31=6258 TUNIT31='K' COMMENT Bolometer bath temperature, in K TFORM32='1E' TTYPE32='BATH_TEM' / entire fieldname = BATH_TEMP OFFSET32=6262 TUNIT32='K' COMMENT END -------------------------------------------------------------------------------- Coadded Sky Interferograms SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'SKY-IFG' / Coadded sky interferograms EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial variance COMMENT / point in GHz DELTA_NU= 13.604162 / Optical frequency interval between variance COMMENT / points in GHz NUM_FREQ= 43 / Number of frequency points in variance COMMENT / with good data PEAK_POS= 360 / Interferogram peak position FFT_LENGTH= 640 / Length of Fast Fourier Transform used END COMMENT TIMVERSN= 'OGIP/93-003' / OGIP memo number where the convention COMMENT / is described COMMENT The times reported in this file are atomic seconds elapsed COMMENT since 00:00:00 UTC, 1 January 1981. Time information is COMMENT recorded in a manner consistent with the convention specified COMMENT in OGIP/93-003 with the understanding that time is counted COMMENT in atomic seconds and the origin of time (MJDREF) is quoted COMMENT in ephemeris MJD. TIMESYS = '1981.00' / time system (same as IRAS) MJDREFI = 44605 / Integer portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 MJDREFF = 0.00059240741 / Fractional portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 TIMEUNIT= 's ' / unit for TSTART, TSTOP, TIMEZERO = seconds TSTART = 280713605.000 / observation start time in TIMESYS system TSTOP = 306806405.990 / observation stop time in TIMESYS system COMMENT COMMENT COMMENT FIRAS Coadded Interferogram COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Instrument Attitude Information COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Ecliptic longitude, epoch 2000.0, in deg (0 -> 360) TFORM4='1E' TTYPE4='ECL_LON' / entire fieldname = ECL_LON OFFSET4=12 TUNIT4='deg' COMMENT Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90) TFORM5='1E' TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT OFFSET5=16 TUNIT5='deg' COMMENT Right ascension, in deg (0 -> 360) TFORM6='1E' TTYPE6='RA' / entire fieldname = RA OFFSET6=20 TUNIT6='deg' COMMENT Declination, in deg (-90 -> +90) TFORM7='1E' TTYPE7='DEC' / entire fieldname = DEC OFFSET7=24 TUNIT7='deg' COMMENT COMMENT Coadded Interferogram and Variances COMMENT COMMENT Coadded interferogram, in counts TFORM8='512E' TDIM8='(512)' TTYPE8='COADDED_' / entire fieldname = COADDED_IFG OFFSET8=28 TUNIT8=' ' COMMENT Variance of real part of coadd spectrum, in (MJy/sr)^2 TFORM9='210E' TDIM9='(210)' TTYPE9='REAL_VAR' / entire fieldname = REAL_VARIANCE OFFSET9=2076 TUNIT9='(MJy/sr)^2' COMMENT Variance of imaginary part of coadd spectrum, in (MJy/sr)^2 TFORM10='210E' TDIM10='(210)' TTYPE10='IMAG_VAR' / entire fieldname = IMAG_VARIANCE OFFSET10=2916 TUNIT10='(MJy/sr)^2' COMMENT Covariance between real and imaginary COMMENT parts of coadd spectrum, in (MJy/sr)^2 TFORM11='210E' TDIM11='(210)' TTYPE11='REAL_IMA' / entire fieldname = REAL_IMAG_VARIANCE OFFSET11=3756 TUNIT11='(MJy/sr)^2' COMMENT COMMENT Number and Times of IFGs COMMENT COMMENT Number of IFGs in coadd TFORM12='1J' TTYPE12='NUM_IFGS' / entire fieldname = NUM_IFGS OFFSET12=4596 TUNIT12=' ' COMMENT Glitch rate for coadded IFG, in glitches/s TFORM13='1E' TTYPE13='GLITCH_R' / entire fieldname = GLITCH_RATE OFFSET13=4600 TUNIT13='gl/s ' COMMENT Glitch rate weighted number of IFGs in coadd TFORM14='1E' TTYPE14='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS OFFSET14=4604 TUNIT14=' ' COMMENT Average data collection time in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM15='1D' TTYPE15='TIME' / entire fieldname = TIME OFFSET15=4608 TUNIT15='s' COMMENT Observation times of IFGs in the coadd; COMMENT in hundredths of days since ejection of the COMMENT FIRAS aperture cover at COMMENT 11:18.00 UTC, 21 November 1989 TFORM16='100J' TDIM16='(100)' TTYPE16='IFG_TIME' / entire fieldname = IFG_TIMES OFFSET16=4616 TUNIT16='d*100' COMMENT Flag indicating orphan IFGs, which occur COMMENT when a coadd is composed of only 1 or COMMENT 2 IFGs. In all other cases, the coadd COMMENT is composed of three or more IFGs; COMMENT applicable only to sky data. COMMENT Flag = 1 indicates 1 or 2 IFGS in the coadd; COMMENT flag = 0 indicates 3 or more IFGs in the coadd. TFORM17='1B' TTYPE17='ORPHANS' / entire fieldname = ORPHANS OFFSET17=5016 TUNIT17=' ' COMMENT COMMENT Template Information COMMENT COMMENT Number of templates subtracted from coadded IFG TFORM18='1J' TTYPE18='NUM_TEMP' / entire fieldname = NUM_TEMPLATES OFFSET18=5017 TUNIT18=' ' COMMENT Number of IFGS used in forming the templates TFORM19='1J' TTYPE19='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS OFFSET19=5021 TUNIT19=' ' COMMENT Flag indicating use of IFGs from neighboring COMMENT pixels in template formation (suitable COMMENT IFGs from 8 neighboring pixels); COMMENT applicable only to sky data. COMMENT Flag = 1 indicates neighbor IFGs were used; COMMENT flag = 0 indicates neighbor IFGs were not used. TFORM20='1B' TTYPE20='NEIGHBOR' / entire fieldname = NEIGHBORS OFFSET20=5025 TUNIT20=' ' COMMENT Number of IFGS from neighboring pixels used in COMMENT forming the templates; only for sky data TFORM21='1J' TTYPE21='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS OFFSET21=5026 TUNIT21=' ' COMMENT Observation times of IFGs used in template COMMENT formation; in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM22='100D' TDIM22='(100)' TTYPE22='TPL_TIME' / entire fieldname = TPL_TIMES OFFSET22=5030 TUNIT22='s' COMMENT Pixel numbers of IFGs used in templates TFORM23='100J' TDIM23='(100)' TTYPE23='TPL_PIXE' / entire fieldname = TPL_PIXELS OFFSET23=5830 TUNIT23=' ' COMMENT COMMENT Bolometer Bias and Voltage COMMENT COMMENT Commanded bolometer bias, in V TFORM24='1E' TTYPE24='BOLOM_BI' / entire fieldname = BOLOM_BIAS OFFSET24=6230 TUNIT24='V' COMMENT Bolometer readout voltage, in V TFORM25='1E' TTYPE25='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE OFFSET25=6234 TUNIT25='V' COMMENT COMMENT Instrument Temperatures COMMENT COMMENT External calibrator temperature, in K TFORM26='1E' TTYPE26='XCAL_TEM' / entire fieldname = XCAL_TEMP OFFSET26=6238 TUNIT26='K' COMMENT Internal calibrator temperature, in K TFORM27='1E' TTYPE27='ICAL_TEM' / entire fieldname = ICAL_TEMP OFFSET27=6242 TUNIT27='K' COMMENT Sky horn temperature, in K TFORM28='1E' TTYPE28='SKYHORN_' / entire fieldname = SKYHORN_TEMP OFFSET28=6246 TUNIT28='K' COMMENT Reference horn temperature, in K TFORM29='1E' TTYPE29='REFHORN_' / entire fieldname = REFHORN_TEMP OFFSET29=6250 TUNIT29='K' COMMENT Dihedral mirror temperature, in K TFORM30='1E' TTYPE30='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP OFFSET30=6254 TUNIT30='K' COMMENT Collimator mirror temperature, in K TFORM31='1E' TTYPE31='MIRROR_T' / entire fieldname = MIRROR_TEMP OFFSET31=6258 TUNIT31='K' COMMENT Bolometer bath temperature, in K TFORM32='1E' TTYPE32='BATH_TEM' / entire fieldname = BATH_TEMP OFFSET32=6262 TUNIT32='K' COMMENT END -------------------------------------------------------------------------------- Calibrated Calibration Spectra SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'CAL-SPEC' / Calibrated calibration spectra EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data FFT_LENGTH= 640 / Length of Fast Fourier Transform used END COMMENT TIMVERSN= 'OGIP/93-003' / OGIP memo number where the convention COMMENT / is described COMMENT The times reported in this file are atomic seconds elapsed COMMENT since 00:00:00 UTC, 1 January 1981. Time information is COMMENT recorded in a manner consistent with the convention specified COMMENT in OGIP/93-003 with the understanding that time is counted COMMENT in atomic seconds and the origin of time (MJDREF) is quoted COMMENT in ephemeris MJD. TIMESYS = '1981.00' / time system (same as IRAS) MJDREFI = 44605 / Integer portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 MJDREFF = 0.00059240741 / Fractional portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 TIMEUNIT= 's ' / unit for TSTART, TSTOP, TIMEZERO = seconds TSTART = 280713605.000 / observation start time in TIMESYS system TSTOP = 306806405.990 / observation stop time in TIMESYS system COMMENT COMMENT COMMENT FIRAS Spectrum COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Instrument Attitude Information COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Ecliptic longitude, epoch 2000.0, in deg (0 -> 360) TFORM4='1E' TTYPE4='ECL_LON' / entire fieldname = ECL_LON OFFSET4=12 TUNIT4='deg' COMMENT Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90) TFORM5='1E' TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT OFFSET5=16 TUNIT5='deg' COMMENT Right ascension, in deg (0 -> 360) TFORM6='1E' TTYPE6='RA' / entire fieldname = RA OFFSET6=20 TUNIT6='deg' COMMENT Declination, in deg (-90 -> +90) TFORM7='1E' TTYPE7='DEC' / entire fieldname = DEC OFFSET7=24 TUNIT7='deg' COMMENT COMMENT Spectrum and Sigmas COMMENT COMMENT Real part of spectrum, in MJy/sr TFORM8='210E' TDIM8='(210)' TTYPE8='REAL_SPE' / entire fieldname = REAL_SPECTRUM OFFSET8=28 TUNIT8='MJy/sr' COMMENT Imaginary part of spectrum, in MJy/sr TFORM9='210E' TDIM9='(210)' TTYPE9='IMAG_SPE' / entire fieldname = IMAG_SPECTRUM OFFSET9=868 TUNIT9='MJy/sr' COMMENT Sigmas of spectrum, in MJy/sr TFORM10='210E' TDIM10='(210)' TTYPE10='SIGMAS' / entire fieldname = SIGMAS OFFSET10=1708 TUNIT10='MJy/sr' COMMENT COMMENT Number and Times of IFGs COMMENT COMMENT Number of IFGs in spectrum TFORM11='1J' TTYPE11='NUM_IFGS' / entire fieldname = NUM_IFGS OFFSET11=2548 TUNIT11=' ' COMMENT Glitch rate for spectrum, in glitches/s TFORM12='1E' TTYPE12='GLITCH_R' / entire fieldname = GLITCH_RATE OFFSET12=2552 TUNIT12='gl/s' COMMENT Glitch rate weighted number of IFGs in spectrum TFORM13='1E' TTYPE13='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS OFFSET13=2556 TUNIT13=' ' COMMENT Average data collection time in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM14='1D' TTYPE14='TIME' / entire fieldname = TIME OFFSET14=2560 TUNIT14='s' COMMENT Observation times of IFGs in the spectrum; COMMENT in hundredths of days since ejection of the COMMENT FIRAS aperture cover at COMMENT 11:18.00 UTC, 21 November 1989 TFORM15='100J' TDIM15='(100)' TTYPE15='IFG_TIME' / entire fieldname = IFG_TIMES OFFSET15=2568 TUNIT15='d*100' COMMENT Flag indicating orphan IFGs, which occur COMMENT when a spectrum is composed of only 1 or COMMENT 2 IFGs. In all other cases, the spectrum COMMENT is composed of three or more IFGs; COMMENT applicable only to sky data. COMMENT Flag = 1 indicates 1 or 2 IFGS in the spectrum; COMMENT flag = 0 indicates 3 or more IFGs in the spectrum. TFORM16='1B' TTYPE16='ORPHANS' / entire fieldname = ORPHANS OFFSET16=2968 TUNIT16=' ' COMMENT COMMENT Template Information COMMENT COMMENT Number of templates subtracted from spectrum TFORM17='1J' TTYPE17='NUM_TEMP' / entire fieldname = NUM_TEMPLATES OFFSET17=2969 TUNIT17=' ' COMMENT Number of IFGS used in forming the templates TFORM18='1J' TTYPE18='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS OFFSET18=2973 TUNIT18=' ' COMMENT Flag indicating use of IFGs from neighboring COMMENT pixels in template formation (suitable COMMENT IFGs from 8 neighboring pixels); COMMENT applicable only to sky data. COMMENT Flag = 1 indicates neighbor IFGs were used; COMMENT flag = 0 indicates neighbor IFGs were not used. TFORM19='1B' TTYPE19='NEIGHBOR' / entire fieldname = NEIGHBORS OFFSET19=2977 TUNIT19=' ' COMMENT Number of IFGS from neighboring pixels used in COMMENT forming the templates; only for sky data TFORM20='1J' TTYPE20='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS OFFSET20=2978 TUNIT20=' ' COMMENT Observation times of IFGs used in template COMMENT formation; in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM21='100D' TDIM21='(100)' TTYPE21='TPL_TIME' / entire fieldname = TPL_TIMES OFFSET21=2982 TUNIT21='s' COMMENT Pixel numbers of IFGs used in templates TFORM22='100J' TDIM22='(100)' TTYPE22='TPL_PIXE' / entire fieldname = TPL_PIXELS OFFSET22=3782 TUNIT22=' ' COMMENT COMMENT Bolometer Response Function COMMENT COMMENT Commanded bolometer bias, in V TFORM23='1E' TTYPE23='BOLOM_BI' / entire fieldname = BOLOM_BIAS OFFSET23=4182 TUNIT23='V' COMMENT Bolometer readout voltage, in V TFORM24='1E' TTYPE24='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE OFFSET24=4186 TUNIT24='V' COMMENT Bolometer DC response, in V/W TFORM25='1E' TTYPE25='DC_RESPO' / entire fieldname = DC_RESPONSE OFFSET25=4190 TUNIT25='V/W' COMMENT Bolometer time constant, in s TFORM26='1E' TTYPE26='TIME_CON' / entire fieldname = TIME_CONSTANT OFFSET26=4194 TUNIT26='s' COMMENT Linear autophase correction, in rad TFORM27='1E' TTYPE27='PHASE_CO' / entire fieldname = PHASE_CORR OFFSET27=4198 TUNIT27='rad' COMMENT COMMENT Instrument Temperatures COMMENT COMMENT External calibrator temperature, in K TFORM28='1E' TTYPE28='XCAL_TEM' / entire fieldname = XCAL_TEMP OFFSET28=4202 TUNIT28='K' COMMENT Internal calibrator temperature, in K TFORM29='1E' TTYPE29='ICAL_TEM' / entire fieldname = ICAL_TEMP OFFSET29=4206 TUNIT29='K' COMMENT Sky horn temperature, in K TFORM30='1E' TTYPE30='SKYHORN_' / entire fieldname = SKYHORN_TEMP OFFSET30=4210 TUNIT30='K' COMMENT Reference horn temperature, in K TFORM31='1E' TTYPE31='REFHORN_' / entire fieldname = REFHORN_TEMP OFFSET31=4214 TUNIT31='K' COMMENT Dihedral mirror temperature, in K TFORM32='1E' TTYPE32='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP OFFSET32=4218 TUNIT32='K' COMMENT Collimator mirror temperature, in K TFORM33='1E' TTYPE33='MIRROR_T' / entire fieldname = MIRROR_TEMP OFFSET33=4222 TUNIT33='K' COMMENT Bolometer operating temperature, in K TFORM34='1E' TTYPE34='BOLOM_TE' / entire fieldname = BOLOM_TEMP OFFSET34=4226 TUNIT34='K' COMMENT Bolometer bath temperature, in K TFORM35='1E' TTYPE35='BATH_TEM' / entire fieldname = BATH_TEMP OFFSET35=4230 TUNIT35='K' COMMENT END -------------------------------------------------------------------------------- Calibrated Sky Spectra SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'SKY-SPEC' / Calibrated sky spectra EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data FFT_LENGTH= 640 / Length of Fast Fourier Transform used END COMMENT TIMVERSN= 'OGIP/93-003' / OGIP memo number where the convention COMMENT / is described COMMENT The times reported in this file are atomic seconds elapsed COMMENT since 00:00:00 UTC, 1 January 1981. Time information is COMMENT recorded in a manner consistent with the convention specified COMMENT in OGIP/93-003 with the understanding that time is counted COMMENT in atomic seconds and the origin of time (MJDREF) is quoted COMMENT in ephemeris MJD. TIMESYS = '1981.00' / time system (same as IRAS) MJDREFI = 44605 / Integer portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 MJDREFF = 0.00059240741 / Fractional portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 TIMEUNIT= 's ' / unit for TSTART, TSTOP, TIMEZERO = seconds TSTART = 280713605.000 / observation start time in TIMESYS system TSTOP = 306806405.990 / observation stop time in TIMESYS system COMMENT COMMENT COMMENT FIRAS Spectrum COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Instrument Attitude Information COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Ecliptic longitude, epoch 2000.0, in deg (0 -> 360) TFORM4='1E' TTYPE4='ECL_LON' / entire fieldname = ECL_LON OFFSET4=12 TUNIT4='deg' COMMENT Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90) TFORM5='1E' TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT OFFSET5=16 TUNIT5='deg' COMMENT Right ascension, in deg (0 -> 360) TFORM6='1E' TTYPE6='RA' / entire fieldname = RA OFFSET6=20 TUNIT6='deg' COMMENT Declination, in deg (-90 -> +90) TFORM7='1E' TTYPE7='DEC' / entire fieldname = DEC OFFSET7=24 TUNIT7='deg' COMMENT COMMENT Spectrum and Sigmas COMMENT COMMENT Real part of spectrum, in MJy/sr TFORM8='210E' TDIM8='(210)' TTYPE8='REAL_SPE' / entire fieldname = REAL_SPECTRUM OFFSET8=28 TUNIT8='MJy/sr' COMMENT Imaginary part of spectrum, in MJy/sr TFORM9='210E' TDIM9='(210)' TTYPE9='IMAG_SPE' / entire fieldname = IMAG_SPECTRUM OFFSET9=868 TUNIT9='MJy/sr' COMMENT Sigmas of spectrum, in MJy/sr TFORM10='210E' TDIM10='(210)' TTYPE10='SIGMAS' / entire fieldname = SIGMAS OFFSET10=1708 TUNIT10='MJy/sr' COMMENT COMMENT Number and Times of IFGs COMMENT COMMENT Number of IFGs in spectrum TFORM11='1J' TTYPE11='NUM_IFGS' / entire fieldname = NUM_IFGS OFFSET11=2548 TUNIT11=' ' COMMENT Glitch rate for spectrum, in glitches/s TFORM12='1E' TTYPE12='GLITCH_R' / entire fieldname = GLITCH_RATE OFFSET12=2552 TUNIT12='gl/s' COMMENT Glitch rate weighted number of IFGs in spectrum TFORM13='1E' TTYPE13='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS OFFSET13=2556 TUNIT13=' ' COMMENT Average data collection time in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM14='1D' TTYPE14='TIME' / entire fieldname = TIME OFFSET14=2560 TUNIT14='s' COMMENT Observation times of IFGs in the spectrum; COMMENT in hundredths of days since ejection of the COMMENT FIRAS aperture cover at COMMENT 11:18.00 UTC, 21 November 1989 TFORM15='100J' TDIM15='(100)' TTYPE15='IFG_TIME' / entire fieldname = IFG_TIMES OFFSET15=2568 TUNIT15='d*100' COMMENT Flag indicating orphan IFGs, which occur COMMENT when a spectrum is composed of only 1 or COMMENT 2 IFGs. In all other cases, the spectrum COMMENT is composed of three or more IFGs; COMMENT applicable only to sky data. COMMENT Flag = 1 indicates 1 or 2 IFGS in the spectrum; COMMENT flag = 0 indicates 3 or more IFGs in the spectrum. TFORM16='1B' TTYPE16='ORPHANS' / entire fieldname = ORPHANS OFFSET16=2968 TUNIT16=' ' COMMENT COMMENT Template Information COMMENT COMMENT Number of templates subtracted from spectrum TFORM17='1J' TTYPE17='NUM_TEMP' / entire fieldname = NUM_TEMPLATES OFFSET17=2969 TUNIT17=' ' COMMENT Number of IFGS used in forming the templates TFORM18='1J' TTYPE18='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS OFFSET18=2973 TUNIT18=' ' COMMENT Flag indicating use of IFGs from neighboring COMMENT pixels in template formation (suitable COMMENT IFGs from 8 neighboring pixels); COMMENT applicable only to sky data. COMMENT Flag = 1 indicates neighbor IFGs were used; COMMENT flag = 0 indicates neighbor IFGs were not used. TFORM19='1B' TTYPE19='NEIGHBOR' / entire fieldname = NEIGHBORS OFFSET19=2977 TUNIT19=' ' COMMENT Number of IFGS from neighboring pixels used in COMMENT forming the templates; only for sky data TFORM20='1J' TTYPE20='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS OFFSET20=2978 TUNIT20=' ' COMMENT Observation times of IFGs used in template COMMENT formation; in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM21='100D' TDIM21='(100)' TTYPE21='TPL_TIME' / entire fieldname = TPL_TIMES OFFSET21=2982 TUNIT21='s' COMMENT Pixel numbers of IFGs used in templates TFORM22='100J' TDIM22='(100)' TTYPE22='TPL_PIXE' / entire fieldname = TPL_PIXELS OFFSET22=3782 TUNIT22=' ' COMMENT COMMENT Bolometer Response Function COMMENT COMMENT Commanded bolometer bias, in V TFORM23='1E' TTYPE23='BOLOM_BI' / entire fieldname = BOLOM_BIAS OFFSET23=4182 TUNIT23='V' COMMENT Bolometer readout voltage, in V TFORM24='1E' TTYPE24='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE OFFSET24=4186 TUNIT24='V' COMMENT Bolometer DC response, in V/W TFORM25='1E' TTYPE25='DC_RESPO' / entire fieldname = DC_RESPONSE OFFSET25=4190 TUNIT25='V/W' COMMENT Bolometer time constant, in s TFORM26='1E' TTYPE26='TIME_CON' / entire fieldname = TIME_CONSTANT OFFSET26=4194 TUNIT26='s' COMMENT Linear autophase correction, in rad TFORM27='1E' TTYPE27='PHASE_CO' / entire fieldname = PHASE_CORR OFFSET27=4198 TUNIT27='rad' COMMENT COMMENT Instrument Temperatures COMMENT COMMENT External calibrator temperature, in K TFORM28='1E' TTYPE28='XCAL_TEM' / entire fieldname = XCAL_TEMP OFFSET28=4202 TUNIT28='K' COMMENT Internal calibrator temperature, in K TFORM29='1E' TTYPE29='ICAL_TEM' / entire fieldname = ICAL_TEMP OFFSET29=4206 TUNIT29='K' COMMENT Sky horn temperature, in K TFORM30='1E' TTYPE30='SKYHORN_' / entire fieldname = SKYHORN_TEMP OFFSET30=4210 TUNIT30='K' COMMENT Reference horn temperature, in K TFORM31='1E' TTYPE31='REFHORN_' / entire fieldname = REFHORN_TEMP OFFSET31=4214 TUNIT31='K' COMMENT Dihedral mirror temperature, in K TFORM32='1E' TTYPE32='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP OFFSET32=4218 TUNIT32='K' COMMENT Collimator mirror temperature, in K TFORM33='1E' TTYPE33='MIRROR_T' / entire fieldname = MIRROR_TEMP OFFSET33=4222 TUNIT33='K' COMMENT Bolometer operating temperature, in K TFORM34='1E' TTYPE34='BOLOM_TE' / entire fieldname = BOLOM_TEMP OFFSET34=4226 TUNIT34='K' COMMENT Bolometer bath temperature, in K TFORM35='1E' TTYPE35='BATH_TEM' / entire fieldname = BATH_TEMP OFFSET35=4230 TUNIT35='K' COMMENT END -------------------------------------------------------------------------------- Differential Calibration Spectra SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'CAL-DIFF' / Differential calibration spectra EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data FFT_LENGTH= 640 / Length of Fast Fourier Transform used END COMMENT TIMVERSN= 'OGIP/93-003' / OGIP memo number where the convention COMMENT / is described COMMENT The times reported in this file are atomic seconds elapsed COMMENT since 00:00:00 UTC, 1 January 1981. Time information is COMMENT recorded in a manner consistent with the convention specified COMMENT in OGIP/93-003 with the understanding that time is counted COMMENT in atomic seconds and the origin of time (MJDREF) is quoted COMMENT in ephemeris MJD. TIMESYS = '1981.00' / time system (same as IRAS) MJDREFI = 44605 / Integer portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 MJDREFF = 0.00059240741 / Fractional portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 TIMEUNIT= 's ' / unit for TSTART, TSTOP, TIMEZERO = seconds TSTART = 280713605.000 / observation start time in TIMESYS system TSTOP = 306806405.990 / observation stop time in TIMESYS system COMMENT COMMENT COMMENT FIRAS Spectrum COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Instrument Attitude Information COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Ecliptic longitude, epoch 2000.0, in deg (0 -> 360) TFORM4='1E' TTYPE4='ECL_LON' / entire fieldname = ECL_LON OFFSET4=12 TUNIT4='deg' COMMENT Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90) TFORM5='1E' TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT OFFSET5=16 TUNIT5='deg' COMMENT Right ascension, in deg (0 -> 360) TFORM6='1E' TTYPE6='RA' / entire fieldname = RA OFFSET6=20 TUNIT6='deg' COMMENT Declination, in deg (-90 -> +90) TFORM7='1E' TTYPE7='DEC' / entire fieldname = DEC OFFSET7=24 TUNIT7='deg' COMMENT COMMENT Spectrum and Sigmas COMMENT COMMENT Real part of spectrum, in MJy/sr TFORM8='210E' TDIM8='(210)' TTYPE8='REAL_SPE' / entire fieldname = REAL_SPECTRUM OFFSET8=28 TUNIT8='MJy/sr' COMMENT Imaginary part of spectrum, in MJy/sr TFORM9='210E' TDIM9='(210)' TTYPE9='IMAG_SPE' / entire fieldname = IMAG_SPECTRUM OFFSET9=868 TUNIT9='MJy/sr' COMMENT Sigmas of spectrum, in MJy/sr TFORM10='210E' TDIM10='(210)' TTYPE10='SIGMAS' / entire fieldname = SIGMAS OFFSET10=1708 TUNIT10='MJy/sr' COMMENT COMMENT Number and Times of IFGs COMMENT COMMENT Number of IFGs in spectrum TFORM11='1J' TTYPE11='NUM_IFGS' / entire fieldname = NUM_IFGS OFFSET11=2548 TUNIT11=' ' COMMENT Glitch rate for spectrum, in glitches/s TFORM12='1E' TTYPE12='GLITCH_R' / entire fieldname = GLITCH_RATE OFFSET12=2552 TUNIT12='gl/s' COMMENT Glitch rate weighted number of IFGs in spectrum TFORM13='1E' TTYPE13='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS OFFSET13=2556 TUNIT13=' ' COMMENT Average data collection time in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM14='1D' TTYPE14='TIME' / entire fieldname = TIME OFFSET14=2560 TUNIT14='s' COMMENT Observation times of IFGs in the spectrum; COMMENT in hundredths of days since ejection of the COMMENT FIRAS aperture cover at COMMENT 11:18.00 UTC, 21 November 1989 TFORM15='100J' TDIM15='(100)' TTYPE15='IFG_TIME' / entire fieldname = IFG_TIMES OFFSET15=2568 TUNIT15='d*100' COMMENT Flag indicating orphan IFGs, which occur COMMENT when a spectrum is composed of only 1 or COMMENT 2 IFGs. In all other cases, the spectrum COMMENT is composed of three or more IFGs; COMMENT applicable only to sky data. COMMENT Flag = 1 indicates 1 or 2 IFGS in the spectrum; COMMENT flag = 0 indicates 3 or more IFGs in the spectrum. TFORM16='1B' TTYPE16='ORPHANS' / entire fieldname = ORPHANS OFFSET16=2968 TUNIT16=' ' COMMENT COMMENT Template Information COMMENT COMMENT Number of templates subtracted from spectrum TFORM17='1J' TTYPE17='NUM_TEMP' / entire fieldname = NUM_TEMPLATES OFFSET17=2969 TUNIT17=' ' COMMENT Number of IFGS used in forming the templates TFORM18='1J' TTYPE18='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS OFFSET18=2973 TUNIT18=' ' COMMENT Flag indicating use of IFGs from neighboring COMMENT pixels in template formation (suitable COMMENT IFGs from 8 neighboring pixels); COMMENT applicable only to sky data. COMMENT Flag = 1 indicates neighbor IFGs were used; COMMENT flag = 0 indicates neighbor IFGs were not used. TFORM19='1B' TTYPE19='NEIGHBOR' / entire fieldname = NEIGHBORS OFFSET19=2977 TUNIT19=' ' COMMENT Number of IFGS from neighboring pixels used in COMMENT forming the templates; only for sky data TFORM20='1J' TTYPE20='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS OFFSET20=2978 TUNIT20=' ' COMMENT Observation times of IFGs used in template COMMENT formation; in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM21='100D' TDIM21='(100)' TTYPE21='TPL_TIME' / entire fieldname = TPL_TIMES OFFSET21=2982 TUNIT21='s' COMMENT Pixel numbers of IFGs used in templates TFORM22='100J' TDIM22='(100)' TTYPE22='TPL_PIXE' / entire fieldname = TPL_PIXELS OFFSET22=3782 TUNIT22=' ' COMMENT COMMENT Bolometer Response Function COMMENT COMMENT Commanded bolometer bias, in V TFORM23='1E' TTYPE23='BOLOM_BI' / entire fieldname = BOLOM_BIAS OFFSET23=4182 TUNIT23='V' COMMENT Bolometer readout voltage, in V TFORM24='1E' TTYPE24='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE OFFSET24=4186 TUNIT24='V' COMMENT Bolometer DC response, in V/W TFORM25='1E' TTYPE25='DC_RESPO' / entire fieldname = DC_RESPONSE OFFSET25=4190 TUNIT25='V/W' COMMENT Bolometer time constant, in s TFORM26='1E' TTYPE26='TIME_CON' / entire fieldname = TIME_CONSTANT OFFSET26=4194 TUNIT26='s' COMMENT Linear autophase correction, in rad TFORM27='1E' TTYPE27='PHASE_CO' / entire fieldname = PHASE_CORR OFFSET27=4198 TUNIT27='rad' COMMENT COMMENT Instrument Temperatures COMMENT COMMENT External calibrator temperature, in K TFORM28='1E' TTYPE28='XCAL_TEM' / entire fieldname = XCAL_TEMP OFFSET28=4202 TUNIT28='K' COMMENT Internal calibrator temperature, in K TFORM29='1E' TTYPE29='ICAL_TEM' / entire fieldname = ICAL_TEMP OFFSET29=4206 TUNIT29='K' COMMENT Sky horn temperature, in K TFORM30='1E' TTYPE30='SKYHORN_' / entire fieldname = SKYHORN_TEMP OFFSET30=4210 TUNIT30='K' COMMENT Reference horn temperature, in K TFORM31='1E' TTYPE31='REFHORN_' / entire fieldname = REFHORN_TEMP OFFSET31=4214 TUNIT31='K' COMMENT Dihedral mirror temperature, in K TFORM32='1E' TTYPE32='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP OFFSET32=4218 TUNIT32='K' COMMENT Collimator mirror temperature, in K TFORM33='1E' TTYPE33='MIRROR_T' / entire fieldname = MIRROR_TEMP OFFSET33=4222 TUNIT33='K' COMMENT Bolometer operating temperature, in K TFORM34='1E' TTYPE34='BOLOM_TE' / entire fieldname = BOLOM_TEMP OFFSET34=4226 TUNIT34='K' COMMENT Bolometer bath temperature, in K TFORM35='1E' TTYPE35='BATH_TEM' / entire fieldname = BATH_TEMP OFFSET35=4230 TUNIT35='K' COMMENT END -------------------------------------------------------------------------------- Differential Sky Spectra SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'SKY-DIFF' / Differential sky spectra EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data FFT_LENGTH= 640 / Length of Fast Fourier Transform used END COMMENT TIMVERSN= 'OGIP/93-003' / OGIP memo number where the convention COMMENT / is described COMMENT The times reported in this file are atomic seconds elapsed COMMENT since 00:00:00 UTC, 1 January 1981. Time information is COMMENT recorded in a manner consistent with the convention specified COMMENT in OGIP/93-003 with the understanding that time is counted COMMENT in atomic seconds and the origin of time (MJDREF) is quoted COMMENT in ephemeris MJD. TIMESYS = '1981.00' / time system (same as IRAS) MJDREFI = 44605 / Integer portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 MJDREFF = 0.00059240741 / Fractional portion of ephemeris MJD COMMENT / corresponding to 0h UTC 1 Jan 1981 TIMEUNIT= 's ' / unit for TSTART, TSTOP, TIMEZERO = seconds TSTART = 280713605.000 / observation start time in TIMESYS system TSTOP = 306806405.990 / observation stop time in TIMESYS system COMMENT COMMENT COMMENT FIRAS Spectrum COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Instrument Attitude Information COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Ecliptic longitude, epoch 2000.0, in deg (0 -> 360) TFORM4='1E' TTYPE4='ECL_LON' / entire fieldname = ECL_LON OFFSET4=12 TUNIT4='deg' COMMENT Ecliptic latitude, epoch 2000.0, in deg (-90 -> +90) TFORM5='1E' TTYPE5='ECL_LAT' / entire fieldname = ECL_LAT OFFSET5=16 TUNIT5='deg' COMMENT Right ascension, in deg (0 -> 360) TFORM6='1E' TTYPE6='RA' / entire fieldname = RA OFFSET6=20 TUNIT6='deg' COMMENT Declination, in deg (-90 -> +90) TFORM7='1E' TTYPE7='DEC' / entire fieldname = DEC OFFSET7=24 TUNIT7='deg' COMMENT COMMENT Spectrum and Sigmas COMMENT COMMENT Real part of spectrum, in MJy/sr TFORM8='210E' TDIM8='(210)' TTYPE8='REAL_SPE' / entire fieldname = REAL_SPECTRUM OFFSET8=28 TUNIT8='MJy/sr' COMMENT Imaginary part of spectrum, in MJy/sr TFORM9='210E' TDIM9='(210)' TTYPE9='IMAG_SPE' / entire fieldname = IMAG_SPECTRUM OFFSET9=868 TUNIT9='MJy/sr' COMMENT Sigmas of spectrum, in MJy/sr TFORM10='210E' TDIM10='(210)' TTYPE10='SIGMAS' / entire fieldname = SIGMAS OFFSET10=1708 TUNIT10='MJy/sr' COMMENT COMMENT Number and Times of IFGs COMMENT COMMENT Number of IFGs in spectrum TFORM11='1J' TTYPE11='NUM_IFGS' / entire fieldname = NUM_IFGS OFFSET11=2548 TUNIT11=' ' COMMENT Glitch rate for spectrum, in glitches/s TFORM12='1E' TTYPE12='GLITCH_R' / entire fieldname = GLITCH_RATE OFFSET12=2552 TUNIT12='gl/s' COMMENT Glitch rate weighted number of IFGs in spectrum TFORM13='1E' TTYPE13='ADJ_NUM_' / entire fieldname = ADJ_NUM_IFGS OFFSET13=2556 TUNIT13=' ' COMMENT Average data collection time in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM14='1D' TTYPE14='TIME' / entire fieldname = TIME OFFSET14=2560 TUNIT14='s' COMMENT Observation times of IFGs in the spectrum; COMMENT in hundredths of days since ejection of the COMMENT FIRAS aperture cover at COMMENT 11:18.00 UTC, 21 November 1989 TFORM15='100J' TDIM15='(100)' TTYPE15='IFG_TIME' / entire fieldname = IFG_TIMES OFFSET15=2568 TUNIT15='d*100' COMMENT Flag indicating orphan IFGs, which occur COMMENT when a spectrum is composed of only 1 or COMMENT 2 IFGs. In all other cases, the spectrum COMMENT is composed of three or more IFGs; COMMENT applicable only to sky data. COMMENT Flag = 1 indicates 1 or 2 IFGS in the spectrum; COMMENT flag = 0 indicates 3 or more IFGs in the spectrum. TFORM16='1B' TTYPE16='ORPHANS' / entire fieldname = ORPHANS OFFSET16=2968 TUNIT16=' ' COMMENT COMMENT Template Information COMMENT COMMENT Number of templates subtracted from spectrum TFORM17='1J' TTYPE17='NUM_TEMP' / entire fieldname = NUM_TEMPLATES OFFSET17=2969 TUNIT17=' ' COMMENT Number of IFGS used in forming the templates TFORM18='1J' TTYPE18='TPL_NUM_' / entire fieldname = TPL_NUM_IFGS OFFSET18=2973 TUNIT18=' ' COMMENT Flag indicating use of IFGs from neighboring COMMENT pixels in template formation (suitable COMMENT IFGs from 8 neighboring pixels); COMMENT applicable only to sky data. COMMENT Flag = 1 indicates neighbor IFGs were used; COMMENT flag = 0 indicates neighbor IFGs were not used. TFORM19='1B' TTYPE19='NEIGHBOR' / entire fieldname = NEIGHBORS OFFSET19=2977 TUNIT19=' ' COMMENT Number of IFGS from neighboring pixels used in COMMENT forming the templates; only for sky data TFORM20='1J' TTYPE20='NBR_NUM_' / entire fieldname = NBR_NUM_IFGS OFFSET20=2978 TUNIT20=' ' COMMENT Observation times of IFGs used in template COMMENT formation; in seconds since COMMENT 00:00.00 UTC, 1 January 1981 TFORM21='100D' TDIM21='(100)' TTYPE21='TPL_TIME' / entire fieldname = TPL_TIMES OFFSET21=2982 TUNIT21='s' COMMENT Pixel numbers of IFGs used in templates TFORM22='100J' TDIM22='(100)' TTYPE22='TPL_PIXE' / entire fieldname = TPL_PIXELS OFFSET22=3782 TUNIT22=' ' COMMENT COMMENT Bolometer Response Function COMMENT COMMENT Commanded bolometer bias, in V TFORM23='1E' TTYPE23='BOLOM_BI' / entire fieldname = BOLOM_BIAS OFFSET23=4182 TUNIT23='V' COMMENT Bolometer readout voltage, in V TFORM24='1E' TTYPE24='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE OFFSET24=4186 TUNIT24='V' COMMENT Bolometer DC response, in V/W TFORM25='1E' TTYPE25='DC_RESPO' / entire fieldname = DC_RESPONSE OFFSET25=4190 TUNIT25='V/W' COMMENT Bolometer time constant, in s TFORM26='1E' TTYPE26='TIME_CON' / entire fieldname = TIME_CONSTANT OFFSET26=4194 TUNIT26='s' COMMENT Linear autophase correction, in rad TFORM27='1E' TTYPE27='PHASE_CO' / entire fieldname = PHASE_CORR OFFSET27=4198 TUNIT27='rad' COMMENT COMMENT Instrument Temperatures COMMENT COMMENT External calibrator temperature, in K TFORM28='1E' TTYPE28='XCAL_TEM' / entire fieldname = XCAL_TEMP OFFSET28=4202 TUNIT28='K' COMMENT Internal calibrator temperature, in K TFORM29='1E' TTYPE29='ICAL_TEM' / entire fieldname = ICAL_TEMP OFFSET29=4206 TUNIT29='K' COMMENT Sky horn temperature, in K TFORM30='1E' TTYPE30='SKYHORN_' / entire fieldname = SKYHORN_TEMP OFFSET30=4210 TUNIT30='K' COMMENT Reference horn temperature, in K TFORM31='1E' TTYPE31='REFHORN_' / entire fieldname = REFHORN_TEMP OFFSET31=4214 TUNIT31='K' COMMENT Dihedral mirror temperature, in K TFORM32='1E' TTYPE32='DIHEDRAL' / entire fieldname = DIHEDRAL_TEMP OFFSET32=4218 TUNIT32='K' COMMENT Collimator mirror temperature, in K TFORM33='1E' TTYPE33='MIRROR_T' / entire fieldname = MIRROR_TEMP OFFSET33=4222 TUNIT33='K' COMMENT Bolometer operating temperature, in K TFORM34='1E' TTYPE34='BOLOM_TE' / entire fieldname = BOLOM_TEMP OFFSET34=4226 TUNIT34='K' COMMENT Bolometer bath temperature, in K TFORM35='1E' TTYPE35='BATH_TEM' / entire fieldname = BATH_TEMP OFFSET35=4230 TUNIT35='K' COMMENT END -------------------------------------------------------------------------------- Destriped Sky Spectra SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'SKY-DEST' / Destriped sky spectra EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of the COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the first COMMENT / two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS Destriped Sky Spectrum COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> 90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Pixel weight TFORM4='1E' TTYPE4='WEIGHT' / entire fieldname = WEIGHT OFFSET4=12 TUNIT4=' ' COMMENT Flag indicating whether or not the COMMENT calibrated spectra in this pixel COMMENT were used for destriping: COMMENT 1 = spectra were used; COMMENT 0 = spectra were not used. TFORM5='1B' TTYPE5='STR_USED' / entire fieldname = STR_USED OFFSET5=16 TUNIT5=' ' COMMENT Destriped spectrum, in MJy/sr TFORM6='182E' TDIM6='(182)' TTYPE6='SPECTRUM' / entire fieldname = SPECTRUM OFFSET6=17 TUNIT6='MJy/sr' COMMENT END -------------------------------------------------------------------------------- Coadd-Based Zodiacal Light Model SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'COADD-ZM' / Coadd-based zodiacal light model EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'HIGH' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. HIGH is a combination COMMENT / of the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. For the uncombined COMMENT / channel/scan mode labels, the first two COMMENT / characters of the label indicate the channel, COMMENT / the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented END COMMENT COMMENT COMMENT FIRAS Coadd Zodi Model COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Field indicating the channel and COMMENT scan mode of the coadded sky COMMENT interferogram corresponding to COMMENT this zodi model spectrum; COMMENT together with REC_NUM, establishes COMMENT a correspondence between the COMMENT coadded sky interferograms (or COMMENT calibrated sky spectra) and COMMENT the zodi model spectra. TFORM2='4A' TTYPE2='CHANSCAN' / entire fieldname = CHANSCAN OFFSET2=4 TUNIT2=' ' COMMENT Field indicating the record number COMMENT of the coadded sky interferogram COMMENT corresponding to this zodi model COMMENT spectrum; together with CHANSCAN, COMMENT establishes a correspondence between COMMENT the coadded sky interferograms (or COMMENT calibrated sky spectra) and COMMENT the zodi model spectra. TFORM3='1J' TTYPE3='REC_NUM' / entire fieldname = REC_NUM OFFSET3=8 TUNIT3=' ' COMMENT Pixel weight TFORM4='1E' TTYPE4='WEIGHT' / entire fieldname = WEIGHT OFFSET4=12 TUNIT4=' ' COMMENT Zodi model spectrum, in MJy/sr TFORM5='170E' TDIM5='(170)' TTYPE5='ZODI_MOD' / entire fieldname = ZODI_MOD OFFSET5=16 TUNIT5='MJy/sr' COMMENT END -------------------------------------------------------------------------------- Pixel-Based Zodiacal Light Model SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'PIXEL-ZM' / Pixel-based zodiacal light model EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'HIGH' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. HIGH is a combination COMMENT / of the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. For the uncombined COMMENT / channel/scan mode labels, the first two COMMENT / characters of the label indicate the channel, COMMENT / the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented END COMMENT COMMENT COMMENT FIRAS Pixel Zodi Model COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> 90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Zodi model spectrum, in MJy/sr TFORM4='170E' TDIM4='(170)' TTYPE4='ZODI_MOD' / entire fieldname = ZODI_MOD OFFSET4=12 TUNIT4='MJy/sr' COMMENT END -------------------------------------------------------------------------------- DIRBE Gradient Kernel SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'DIRBE-GK' / DIRBE gradient kernel EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HRES is a combination of COMMENT / the high resolution RLLF and LLLF data. For COMMENT / the uncombined channel/scan mode labels, the COMMENT / first two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented END COMMENT COMMENT COMMENT FIRAS DIRBE Gradient Kernel COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Field indicating the channel and COMMENT scan mode of the coadded sky COMMENT interferogram corresponding to COMMENT these DIRBE values; together COMMENT with REC_NUM, establishes a COMMENT correspondence between the COMMENT coadded sky interferograms (or COMMENT calibrated sky spectra) and COMMENT the DIRBE values. TFORM2='4A' TTYPE2='CHANSCAN' / entire fieldname = CHANSCAN OFFSET2=4 TUNIT2=' ' COMMENT Field indicating the record number COMMENT of the coadded sky interferogram COMMENT corresponding to these DIRBE values; COMMENT together with CHANSCAN, establishes COMMENT a correspondence between the coadded COMMENT sky interferograms (or calibrated COMMENT sky spectra) and the DIRBE values. TFORM3='1J' TTYPE3='REC_NUM' / entire fieldname = REC_NUM OFFSET3=8 TUNIT3=' ' COMMENT Pixel weight TFORM4='1E' TTYPE4='WEIGHT' / entire fieldname = WEIGHT OFFSET4=12 TUNIT4=' ' COMMENT DIRBE band 8 gradient kernel TFORM5='1E' TTYPE5='BAND_8' / entire fieldname = BAND_8 OFFSET5=16 TUNIT5=' ' COMMENT DIRBE band 9 gradient kernel TFORM6='1E' TTYPE6='BAND_9' / entire fieldname = BAND_9 OFFSET6=20 TUNIT6=' ' COMMENT DIRBE band 10 gradient kernel TFORM7='1E' TTYPE7='BAND_10' / entire fieldname = BAND_10 OFFSET7=24 TUNIT7=' ' COMMENT END -------------------------------------------------------------------------------- Physical Stripes SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'PHYS-ST' / Physical stripes EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of the COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the first COMMENT / two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS Physical Stripe COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Stripe identifier TFORM1='40A' TTYPE1='STR_ID' / entire fieldname = STR_ID OFFSET1=0 TUNIT1=' ' COMMENT Stripe spectrum, in MJy/sr TFORM2='182E' TDIM2='(182)' TTYPE2='STR_SPEC' / entire fieldname = STR_SPEC OFFSET2=40 TUNIT2='MJy/sr' COMMENT Stripe rect array (dimensionless) TFORM3='6144E' TDIM3='(6144)' TTYPE3='STR_RECT' / entire fieldname = STR_RECT OFFSET3=768 TUNIT3=' ' COMMENT Stripe covariance (dimensionless) TFORM4='30E' TDIM4='(30)' TTYPE4='STR_COVR' / entire fieldname = STR_COVR OFFSET4=25344 TUNIT4=' ' COMMENT END -------------------------------------------------------------------------------- Orthogonal Stripes SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'ORTHO-ST' / Orthogonal stripes EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of the COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the first COMMENT / two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS Orthogonal Stripe COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Stripe gammas, in MJy/sr TFORM1='182E' TDIM1='(182)' TTYPE1='STR_GAMA' / entire fieldname = STR_GAMA OFFSET1=0 TUNIT1='MJy/sr' COMMENT Stripe betas (dimensionless) TFORM2='6144E' TDIM2='(6144)' TTYPE2='STR_BETA' / entire fieldname = STR_BETA OFFSET2=728 TUNIT2=' ' COMMENT END -------------------------------------------------------------------------------- C Vector SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'C-VEC' / C vector EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of the COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the first COMMENT / two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data GALATEXC= 15 / Absolute value of galactic latitude in degrees COMMENT / below which input data was excluded in COMMENT / producing this dataset END COMMENT COMMENT COMMENT FIRAS C Vector COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT C vector, in MJy/sr TFORM1='182E' TDIM1='(182)' TTYPE1='C_VECTOR' / entire fieldname = C_VECTOR OFFSET1=0 TUNIT1='MJy/sr' COMMENT END -------------------------------------------------------------------------------- A Vector SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'A-VEC' / A vector EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands: HIF2 from 612.18729 to 1346.8120 GHz, COMMENT / HIF3 from 1360.4162 to 2095.0410 GHz, and COMMENT / HIF4 from 2108.6451 to 2911.2907 GHz. HRES is COMMENT / a combination of the high resolution RLLF and COMMENT / LLLF data. For the uncombined channel/scan COMMENT / mode labels, the first two characters of the COMMENT / label indicate the channel, the first being COMMENT / the instrument side: right (R) or left (L); COMMENT / and the second being the frequency: high (H) COMMENT / or low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or fast COMMENT / (F). In addition, the scan mode may take the COMMENT / following values for low frequency data only COMMENT / (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 0.0 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 32 / Number of frequency points with good data GALATEXC= 15 / Absolute value of galactic latitude in degrees COMMENT / below which input data was excluded in COMMENT / producing this dataset END COMMENT COMMENT COMMENT FIRAS A Vector COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT A vector, in MJy/sr TFORM1='32E' TDIM1='(32)' TTYPE1='A_VECTOR' / entire fieldname = A_VECTOR OFFSET1=0 TUNIT1='MJy/sr' COMMENT END -------------------------------------------------------------------------------- Covariance Matrix SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'COV-MAT' / Covariance matrix EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of the COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the first COMMENT / two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data GALATEXC= 15 / Absolute value of galactic latitude in degrees COMMENT / below which input data was excluded in COMMENT / producing this dataset END COMMENT COMMENT COMMENT FIRAS Covariance Matrix COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Row number of covariance matrix TFORM1='1I' TTYPE1='ROW_NUM' / entire fieldname = ROW_NUM OFFSET1=0 TUNIT1=' ' COMMENT Row of covariance matrix, in (MJy/sr)^2 TFORM2='182E' TDIM2='(182)' TTYPE2='ROW_COVR' / entire fieldname = ROW_COVR OFFSET2=2 TUNIT2='(MJy/sr)^2' COMMENT END -------------------------------------------------------------------------------- Chi-Squared SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'CHI-SQ' / Chi-squared EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of the COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the first COMMENT / two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented END COMMENT COMMENT COMMENT FIRAS Chi-Squared COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> 90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Pixel weight TFORM4='1E' TTYPE4='WEIGHT' / entire fieldname = WEIGHT OFFSET4=12 TUNIT4=' ' COMMENT Degrees of freedom TFORM5='1J' TTYPE5='DOF' / entire fieldname = DOF OFFSET5=16 TUNIT5=' ' COMMENT Chi-squared TFORM6='1E' TTYPE6='COMB_CSQ' / entire fieldname = COMB_CSQ OFFSET6=20 TUNIT6=' ' COMMENT END -------------------------------------------------------------------------------- Calibration Model Solution SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'CAL-MOD' / Calibration model solution EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. COMMENT / The scan mode value FA indicates: for high COMMENT / frequency data (channel = RH or LH), a COMMENT / combination of SF and LF data; and for low COMMENT / frequency data (channel = RL or LL), a COMMENT / combination of FS and FL data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz OM_ZERO = 11.149872 / Audio frequency of initial data point in rad/s DELTA_OM= 2.2299744 / Audio frequency interval between data points COMMENT / in rad/s NUM_FREQ= 43 / Number of frequency points with good data NORMALIZ= 7.479336E 08 / Instrumental gain function normalization, COMMENT / in (MJy*V)/(W*sr) END COMMENT COMMENT COMMENT FIRAS Calibration Model Solution COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Electronics Gain Function COMMENT COMMENT Real part of electronics gain function (dimensionless) TFORM1='210E' TDIM1='(210)' TTYPE1='RELEX_GA' / entire fieldname = RELEX_GAIN OFFSET1=0 TUNIT1=' ' COMMENT Imaginary part of electronics gain function (dimensionless) TFORM2='210E' TDIM2='(210)' TTYPE2='IELEX_GA' / entire fieldname = IELEX_GAIN OFFSET2=840 TUNIT2=' ' COMMENT COMMENT Optical Transfer Function COMMENT COMMENT Real part of optical transfer function (dimensionless) TFORM3='210E' TDIM3='(210)' TTYPE3='RTRANSFE' / entire fieldname = RTRANSFER OFFSET3=1680 TUNIT3=' ' COMMENT Imaginary part of optical transfer function (dimensionless) TFORM4='210E' TDIM4='(210)' TTYPE4='ITRANSFE' / entire fieldname = ITRANSFER OFFSET4=2520 TUNIT4=' ' COMMENT COMMENT Bolometer Response Function COMMENT (for the mission average bolometer state; COMMENT response function = (1 + iwT)/S0, where COMMENT T is the time constant and COMMENT S0 is the DC response) COMMENT COMMENT Bolometer time constant, in s TFORM5='1E' TTYPE5='TIME_CON' / entire fieldname = TIME_CONSTANT OFFSET5=3360 TUNIT5='s' COMMENT Bolometer DC response, in V/W TFORM6='1E' TTYPE6='DC_RESPO' / entire fieldname = DC_RESPONSE OFFSET6=3364 TUNIT6='V/W' COMMENT COMMENT Apodization Function COMMENT (applied to interferograms in the time domain COMMENT prior to Fourier transformation) COMMENT COMMENT Apodization function (dimensionless) TFORM7='512E' TDIM7='(512)' TTYPE7='APODIZAT' / entire fieldname = APODIZATION OFFSET7=3368 TUNIT7=' ' COMMENT COMMENT Bolometer Model Parameters COMMENT COMMENT Characteristic resistance, in ohms TFORM8='1E' TTYPE8='BOLPARM_' / entire fieldname = BOLPARM_R0 OFFSET8=5416 TUNIT8='ohm' COMMENT Characteristic temperature, in K TFORM9='1E' TTYPE9='BOLPARM2' / entire fieldname = BOLPARM_T0 OFFSET9=5420 TUNIT9='K' COMMENT Coefficient of thermal conductance, in W/K^(bolparm_beta+1) TFORM10='1E' TTYPE10='BOLPARM3' / entire fieldname = BOLPARM_G1 OFFSET10=5424 TUNIT10='W/K^(bolparm_beta+1)' COMMENT Index of thermal conductance (dimensionless) TFORM11='1E' TTYPE11='BOLPARM4' / entire fieldname = BOLPARM_BETA OFFSET11=5428 TUNIT11=' ' COMMENT Resistance due to electric field, in K/V TFORM12='1E' TTYPE12='BOLPARM5' / entire fieldname = BOLPARM_RHO OFFSET12=5432 TUNIT12='K/V' COMMENT Heat capacity coefficient for linear temperature term, in J/K^2 TFORM13='1E' TTYPE13='BOLPARM6' / entire fieldname = BOLPARM_C1 OFFSET13=5436 TUNIT13='J/K^2' COMMENT Heat capacity coefficient for cubic temperature term, in J/K^4 TFORM14='1E' TTYPE14='BOLPARM7' / entire fieldname = BOLPARM_C3 OFFSET14=5440 TUNIT14='J/K^4' COMMENT Readout JFET offset, in V TFORM15='1E' TTYPE15='BOLPARM8' / entire fieldname = BOLPARM_JO OFFSET15=5444 TUNIT15='V' COMMENT Readout JFET gain (dimensionless) TFORM16='1E' TTYPE16='BOLPARM9' / entire fieldname = BOLPARM_JG OFFSET16=5448 TUNIT16=' ' COMMENT Load resistance, in ohms TFORM17='1E' TTYPE17='BOLPARM10' / entire fieldname = BOLPARM_RL OFFSET17=5452 TUNIT17='ohm' COMMENT COMMENT Mission Average Bolometer State COMMENT COMMENT Commanded bolometer bias, in V TFORM18='1E' TTYPE18='BOLOM_BI' / entire fieldname = BOLOM_BIAS OFFSET18=5456 TUNIT18='V' COMMENT Bolometer readout voltage, in V TFORM19='1E' TTYPE19='BOLOM_VO' / entire fieldname = BOLOM_VOLTAGE OFFSET19=5460 TUNIT19='V' COMMENT Bolometer operating temperature, in K TFORM20='1E' TTYPE20='BOLOM_TE' / entire fieldname = BOLOM_TEMPERATURE OFFSET20=5464 TUNIT20='K' COMMENT Bolometer bath temperature, in K TFORM21='1E' TTYPE21='BOLOM_B2' / entire fieldname = BOLOM_BATHTEMP OFFSET21=5468 TUNIT21='K' COMMENT COMMENT Optical Model COMMENT COMMENT Real part of internal calibrator emissivity (dimensionless) TFORM22='210E' TDIM22='(210)' TTYPE22='RICAL' / entire fieldname = RICAL OFFSET22=5472 TUNIT22=' ' COMMENT Imaginary part of internal calibrator emissivity (dimensionless) TFORM23='210E' TDIM23='(210)' TTYPE23='IICAL' / entire fieldname = IICAL OFFSET23=6312 TUNIT23=' ' COMMENT Real part of sky horn emissivity (dimensionless) TFORM24='210E' TDIM24='(210)' TTYPE24='RSKYHORN' / entire fieldname = RSKYHORN OFFSET24=7152 TUNIT24=' ' COMMENT Imaginary part of sky horn emissivity (dimensionless) TFORM25='210E' TDIM25='(210)' TTYPE25='ISKYHORN' / entire fieldname = ISKYHORN OFFSET25=7992 TUNIT25=' ' COMMENT Real part of reference horn emissivity (dimensionless) TFORM26='210E' TDIM26='(210)' TTYPE26='RREFHORN' / entire fieldname = RREFHORN OFFSET26=8832 TUNIT26=' ' COMMENT Imaginary part of reference horn emissivity (dimensionless) TFORM27='210E' TDIM27='(210)' TTYPE27='IREFHORN' / entire fieldname = IREFHORN OFFSET27=9672 TUNIT27=' ' COMMENT Real part of dihedral emissivity (dimensionless) TFORM28='210E' TDIM28='(210)' TTYPE28='RDIHEDRA' / entire fieldname = RDIHEDRAL OFFSET28=10512 TUNIT28=' ' COMMENT Imaginary part of dihedral emissivity (dimensionless) TFORM29='210E' TDIM29='(210)' TTYPE29='IDIHEDRA' / entire fieldname = IDIHEDRAL OFFSET29=11352 TUNIT29=' ' COMMENT Real part of structure emissivity (dimensionless) TFORM30='210E' TDIM30='(210)' TTYPE30='RSTRUCTU' / entire fieldname = RSTRUCTURE OFFSET30=12192 TUNIT30=' ' COMMENT Imaginary part of structure emissivity (dimensionless) TFORM31='210E' TDIM31='(210)' TTYPE31='ISTRUCTU' / entire fieldname = ISTRUCTURE OFFSET31=13032 TUNIT31=' ' COMMENT Real part of bolometer emissivity (dimensionless) TFORM32='210E' TDIM32='(210)' TTYPE32='RBOLOMET' / entire fieldname = RBOLOMETER OFFSET32=13872 TUNIT32=' ' COMMENT Imaginary part of bolometer emissivity (dimensionless) TFORM33='210E' TDIM33='(210)' TTYPE33='IBOLOMET' / entire fieldname = IBOLOMETER OFFSET33=14712 TUNIT33=' ' COMMENT COMMENT Optical Model Harmonic Correction Coefficients COMMENT COMMENT 2nd harmonic correction coefficient (dimensionless) TFORM34='1E' TTYPE34='OPTPARM_' / entire fieldname = OPTPARM_2H OFFSET34=15552 TUNIT34=' ' COMMENT 3rd harmonic correction coefficient (dimensionless) TFORM35='1E' TTYPE35='OPTPARM2' / entire fieldname = OPTPARM_3H OFFSET35=15556 TUNIT35=' ' COMMENT COMMENT Optical Model Vibration Correction Coefficients COMMENT (primary vibration correction is a COMMENT quartic polynomial in time) COMMENT COMMENT Primary vibration correction offset (dimensionless) TFORM36='1E' TTYPE36='OPTPARM3' / entire fieldname = OPTPARM_VP0 OFFSET36=15560 TUNIT36=' ' COMMENT Primary vibration correction linear coefficient, in yr^(-1) TFORM37='1E' TTYPE37='OPTPARM4' / entire fieldname = OPTPARM_VP1 OFFSET37=15564 TUNIT37='yr^(-1)' COMMENT Primary vibration correction quadratic coefficient, in yr^(-2) TFORM38='1E' TTYPE38='OPTPARM5' / entire fieldname = OPTPARM_VP2 OFFSET38=15568 TUNIT38='yr^(-2)' COMMENT Primary vibration correction cubic coefficient, in yr^(-3) TFORM39='1E' TTYPE39='OPTPARM6' / entire fieldname = OPTPARM_VP3 OFFSET39=15572 TUNIT39='yr^(-3)' COMMENT Primary vibration correction quartic coefficient, in yr^(-4) TFORM40='1E' TTYPE40='OPTPARM7' / entire fieldname = OPTPARM_VP4 OFFSET40=15576 TUNIT40='yr^(-4)' COMMENT Secondary vibration correction coefficient (dimensionless) TFORM41='1E' TTYPE41='OPTPARM8' / entire fieldname = OPTPARM_VS OFFSET41=15580 TUNIT41=' ' COMMENT COMMENT Internal Calibrator Temperature Correction Parameters COMMENT (temperature drift is exponential in time COMMENT since COBE aperture cover ejection: COMMENT 11:18:00 UTC, 21 November 1989) COMMENT COMMENT Ical drift amplitude, in K TFORM42='1E' TTYPE42='DRIFT_AM' / entire fieldname = DRIFT_AMP OFFSET42=15584 TUNIT42='K' COMMENT Ical drift time constant, in yr TFORM43='1E' TTYPE43='DRIFT_TC' / entire fieldname = DRIFT_TC OFFSET43=15588 TUNIT43='yr' COMMENT Ical drift offset, in K TFORM44='1E' TTYPE44='DRIFT_OF' / entire fieldname = DRIFT_OFFSET OFFSET44=15592 TUNIT44='K' COMMENT COMMENT External Calibrator Temperature Correction COMMENT COMMENT Xcal temperature correction, in K TFORM45='1E' TTYPE45='XCAL_COR' / entire fieldname = XCAL_CORRECTION OFFSET45=15596 TUNIT45='K' COMMENT END -------------------------------------------------------------------------------- Calibration Errors SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'CAL-ERR' / Calibration errors EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. COMMENT / The scan mode value FA indicates: for high COMMENT / frequency data (channel = RH or LH), a COMMENT / combination of SF and LF data; and for low COMMENT / frequency data (channel = RL or LL), a COMMENT / combination of FS and FL data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS Calibration Errors COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Error Terms COMMENT COMMENT Emissivity gain error (dimensionless) TFORM1='210E' TDIM1='(210)' TTYPE1='PEP_GAIN' / entire fieldname = PEP_GAIN OFFSET1=0 TUNIT1=' ' COMMENT Emissivity offset error, in MJy/sr TFORM2='210E' TDIM2='(210)' TTYPE2='PEP_OFFS' / entire fieldname = PEP_OFFSET OFFSET2=840 TUNIT2='MJy/sr' COMMENT Bolometer parameter gain error (dimensionless) TFORM3='2730E' TDIM3='(13,210)' TTYPE3='JCJ_GAIN' / entire fieldname = JCJ_GAIN OFFSET3=1680 TUNIT3=' ' COMMENT Bolometer parameter offset error, in MJy/sr TFORM4='2730E' TDIM4='(13,210)' TTYPE4='JCJ_OFFS' / entire fieldname = JCJ_OFFSET OFFSET4=12600 TUNIT4='MJy/sr' COMMENT Ical temperature error, in K TFORM5='1E' TTYPE5='PUP_TEMP' / entire fieldname = PUP_TEMP OFFSET5=23520 TUNIT5='K' COMMENT Ical temperature error spectrum, in MJy/sr TFORM6='210E' TDIM6='(210)' TTYPE6='PUP_SPEC' / entire fieldname = PUP_SPEC OFFSET6=23524 TUNIT6='MJy/sr' COMMENT Absolute temperature error, in K TFORM7='1E' TTYPE7='PTP_TEMP' / entire fieldname = PTP_TEMP OFFSET7=24364 TUNIT7='K' COMMENT Absolute temperature error spectrum, in MJy/sr TFORM8='210E' TDIM8='(210)' TTYPE8='PTP_SPEC' / entire fieldname = PTP_SPEC OFFSET8=24368 TUNIT8='MJy/sr' COMMENT END -------------------------------------------------------------------------------- Combined Calibration Errors SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'CCAL-ERR' / Combined calibration errors EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of the COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the first COMMENT / two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS Combined Calibration Errors COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Error Terms COMMENT COMMENT Emissivity gain error (dimensionless) TFORM1='182E' TDIM1='(182)' TTYPE1='PEP_GAIN' / entire fieldname = PEP_GAIN OFFSET1=0 TUNIT1=' ' COMMENT Bolometer parameter gain error (dimensionless) TFORM2='182E' TDIM2='(182)' TTYPE2='JCJ_GAIN' / entire fieldname = JCJ_GAIN OFFSET2=728 TUNIT2=' ' COMMENT Ical temperature error, in K TFORM3='1E' TTYPE3='PUP_TEMP' / entire fieldname = PUP_TEMP OFFSET3=1456 TUNIT3='K' COMMENT Ical temperature error spectrum, in MJy/sr TFORM4='182E' TDIM4='(182)' TTYPE4='PUP_SPEC' / entire fieldname = PUP_SPEC OFFSET4=1460 TUNIT4='MJy/sr' COMMENT Absolute temperature error, in K TFORM5='1E' TTYPE5='PTP_TEMP' / entire fieldname = PTP_TEMP OFFSET5=2188 TUNIT5='K' COMMENT Absolute temperature error spectrum, in MJy/sr TFORM6='182E' TDIM6='(182)' TTYPE6='PTP_SPEC' / entire fieldname = PTP_SPEC OFFSET6=2192 TUNIT6='MJy/sr' COMMENT END -------------------------------------------------------------------------------- Model Selection Errors SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'MOD-ERRS' / Model selection errors EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HIF2, HIF3, and HIF4 COMMENT / divide the HIGH data into three frequency COMMENT / bands, as indicated by the NU_ZERO and COMMENT / NUM_FREQ fields. HRES is a combination of the COMMENT / high resolution RLLF and LLLF data. For the COMMENT / uncombined channel/scan mode labels, the first COMMENT / two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS Comparison Spectrum COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT Destriper model description TFORM1='80A' TTYPE1='DESCRIP1' / entire fieldname = DESCRIP1 OFFSET1=0 TUNIT1=' ' COMMENT Comparison destriper model description TFORM2='80A' TTYPE2='DESCRIP2' / entire fieldname = DESCRIP2 OFFSET2=80 TUNIT2=' ' COMMENT Channel/scan mode TFORM3='4A' TTYPE3='CHANSCAN' / entire fieldname = CHANSCAN1 OFFSET3=160 TUNIT3=' ' COMMENT Comparison channel/scan mode TFORM4='4A' TTYPE4='CHANSCA2' / entire fieldname = CHANSCAN2 OFFSET4=164 TUNIT4=' ' COMMENT Difference spectrum, in MJy/sr TFORM5='60E' TDIM5='(60)' TTYPE5='DIFF_SPE' / entire fieldname = DIFF_SPEC OFFSET5=168 TUNIT5='MJy/sr' COMMENT Difference spectrum sigma, in MJy/sr TFORM6='60E' TDIM6='(60)' TTYPE6='DIFF_SP2' / entire fieldname = DIFF_SPEC_SIG OFFSET6=408 TUNIT6='MJy/sr' COMMENT END -------------------------------------------------------------------------------- Low Frequency Line Profiles SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'LLINE-PR' / Low frequency line profiles EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LLSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. COMMENT / The scan mode value FA indicates: for high COMMENT / frequency data (channel = RH or LH), a COMMENT / combination of SF and LF data; and for low COMMENT / frequency data (channel = RL or LL), a COMMENT / combination of FS and FL data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS Low Frequency Line Profiles COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT 115.27 GHz CO (J=1-0) line profile, in cm*MJy/(nanowatts/m^2) TFORM1='210E' TDIM1='(210)' TTYPE1='CO_115' / entire fieldname = CO_115 OFFSET1=0 TUNIT1='cm*MJy/(nanowatts/m^2)' COMMENT 230.54 GHz CO (J=2-1) line profile, in cm*MJy/(nanowatts/m^2) TFORM2='210E' TDIM2='(210)' TTYPE2='CO_230' / entire fieldname = CO_230 OFFSET2=840 TUNIT2='cm*MJy/(nanowatts/m^2)' COMMENT 345.80 GHz CO (J=3-2) line profile, in cm*MJy/(nanowatts/m^2) TFORM3='210E' TDIM3='(210)' TTYPE3='CO_345' / entire fieldname = CO_345 OFFSET3=1680 TUNIT3='cm*MJy/(nanowatts/m^2)' COMMENT 424.75 GHz O2 line profile, in cm*MJy/(nanowatts/m^2) TFORM4='210E' TDIM4='(210)' TTYPE4='O2_424' / entire fieldname = O2_424 OFFSET4=2520 TUNIT4='cm*MJy/(nanowatts/m^2)' COMMENT 461.04 GHz CO (J=4-3) line profile, in cm*MJy/(nanowatts/m^2) TFORM5='210E' TDIM5='(210)' TTYPE5='CO_461' / entire fieldname = CO_461 OFFSET5=3360 TUNIT5='cm*MJy/(nanowatts/m^2)' COMMENT 492.23 GHz [C I] line profile, in cm*MJy/(nanowatts/m^2) TFORM6='210E' TDIM6='(210)' TTYPE6='C_I_492' / entire fieldname = C_I_492 OFFSET6=4200 TUNIT6='cm*MJy/(nanowatts/m^2)' COMMENT 556.89 GHz H2O line profile, in cm*MJy/(nanowatts/m^2) TFORM7='210E' TDIM7='(210)' TTYPE7='H2O_556' / entire fieldname = H2O_556 OFFSET7=5040 TUNIT7='cm*MJy/(nanowatts/m^2)' COMMENT 576.27 GHz CO (J=5-4) line profile, in cm*MJy/(nanowatts/m^2) TFORM8='210E' TDIM8='(210)' TTYPE8='CO_576' / entire fieldname = CO_576 OFFSET8=5880 TUNIT8='cm*MJy/(nanowatts/m^2)' COMMENT END -------------------------------------------------------------------------------- High Frequency Line Profiles SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'HLINE-PR' / High frequency line profiles EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LHSS' / Channel and mirror transport mechanism scan COMMENT / mode identifier. The first two characters COMMENT / indicate the channel, the first being the COMMENT / instrument side: right (R) or left (L); and COMMENT / the second being the frequency: high (H) or COMMENT / low (L). The third and fourth characters COMMENT / indicate the scan mode, the third being the COMMENT / scan length: short (S) or long (L); and the COMMENT / fourth being the scan speed: slow (S) or COMMENT / fast (F). In addition, the scan mode may COMMENT / take the following values for low frequency COMMENT / data only (channel = RL or LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. COMMENT / The scan mode value FA indicates: for high COMMENT / frequency data (channel = RH or LH), a COMMENT / combination of SF and LF data; and for low COMMENT / frequency data (channel = RL or LL), a COMMENT / combination of FS and FL data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 210 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS High Frequency Line Profiles COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT 115.27 GHz CO (J=1-0) line profile, in cm*MJy/(nanowatts/m^2) TFORM1='210E' TDIM1='(210)' TTYPE1='CO_115' / entire fieldname = CO_115 OFFSET1=0 TUNIT1='cm*MJy/(nanowatts/m^2)' COMMENT 230.54 GHz CO (J=2-1) line profile, in cm*MJy/(nanowatts/m^2) TFORM2='210E' TDIM2='(210)' TTYPE2='CO_230' / entire fieldname = CO_230 OFFSET2=840 TUNIT2='cm*MJy/(nanowatts/m^2)' COMMENT 345.80 GHz CO (J=3-2) line profile, in cm*MJy/(nanowatts/m^2) TFORM3='210E' TDIM3='(210)' TTYPE3='CO_345' / entire fieldname = CO_345 OFFSET3=1680 TUNIT3='cm*MJy/(nanowatts/m^2)' COMMENT 424.75 GHz O2 line profile, in cm*MJy/(nanowatts/m^2) TFORM4='210E' TDIM4='(210)' TTYPE4='O2_424' / entire fieldname = O2_424 OFFSET4=2520 TUNIT4='cm*MJy/(nanowatts/m^2)' COMMENT 461.04 GHz CO (J=4-3) line profile, in cm*MJy/(nanowatts/m^2) TFORM5='210E' TDIM5='(210)' TTYPE5='CO_461' / entire fieldname = CO_461 OFFSET5=3360 TUNIT5='cm*MJy/(nanowatts/m^2)' COMMENT 492.23 GHz [C I] line profile, in cm*MJy/(nanowatts/m^2) TFORM6='210E' TDIM6='(210)' TTYPE6='C_I_492' / entire fieldname = C_I_492 OFFSET6=4200 TUNIT6='cm*MJy/(nanowatts/m^2)' COMMENT 556.89 GHz H2O line profile, in cm*MJy/(nanowatts/m^2) TFORM7='210E' TDIM7='(210)' TTYPE7='H2O_556' / entire fieldname = H2O_556 OFFSET7=5040 TUNIT7='cm*MJy/(nanowatts/m^2)' COMMENT 576.27 GHz CO (J=5-4) line profile, in cm*MJy/(nanowatts/m^2) TFORM8='210E' TDIM8='(210)' TTYPE8='CO_576' / entire fieldname = CO_576 OFFSET8=5880 TUNIT8='cm*MJy/(nanowatts/m^2)' COMMENT 691.47 GHz CO (J=6-5) line profile, in cm*MJy/(nanowatts/m^2) TFORM9='210E' TDIM9='(210)' TTYPE9='CO_691' / entire fieldname = CO_691 OFFSET9=6720 TUNIT9='cm*MJy/(nanowatts/m^2)' COMMENT 809.44 GHz [C I] line profile, in cm*MJy/(nanowatts/m^2) TFORM10='210E' TDIM10='(210)' TTYPE10='C_I_809' / entire fieldname = C_I_809 OFFSET10=7560 TUNIT10='cm*MJy/(nanowatts/m^2)' COMMENT 1113.3 GHz H2O line profile, in cm*MJy/(nanowatts/m^2) TFORM11='210E' TDIM11='(210)' TTYPE11='H2O_1113' / entire fieldname = H2O_1113 OFFSET11=8400 TUNIT11='cm*MJy/(nanowatts/m^2)' COMMENT 1461.1 GHz [N II] line profile, in cm*MJy/(nanowatts/m^2) TFORM12='210E' TDIM12='(210)' TTYPE12='N_II_146' / entire fieldname = N_II_1461 OFFSET12=9240 TUNIT12='cm*MJy/(nanowatts/m^2)' COMMENT 1716.6 GHz H2O (J=2-1) line profile, in cm*MJy/(nanowatts/m^2) TFORM13='210E' TDIM13='(210)' TTYPE13='H2O_1716' / entire fieldname = H2O_1716 OFFSET13=10080 TUNIT13='cm*MJy/(nanowatts/m^2)' COMMENT 1900.5 GHz [C II] line profile, in cm*MJy/(nanowatts/m^2) TFORM14='210E' TDIM14='(210)' TTYPE14='C_II_190' / entire fieldname = C_II_1900 OFFSET14=10920 TUNIT14='cm*MJy/(nanowatts/m^2)' COMMENT 2060.1 GHz [O I] line profile, in cm*MJy/(nanowatts/m^2) TFORM15='210E' TDIM15='(210)' TTYPE15='O_I_2060' / entire fieldname = O_I_2060 OFFSET15=11760 TUNIT15='cm*MJy/(nanowatts/m^2)' COMMENT 2311.7 GHz [Si I] line profile, in cm*MJy/(nanowatts/m^2) TFORM16='210E' TDIM16='(210)' TTYPE16='SI_I_231' / entire fieldname = SI_I_2311 OFFSET16=12600 TUNIT16='cm*MJy/(nanowatts/m^2)' COMMENT 2459.4 GHz [N II] line profile, in cm*MJy/(nanowatts/m^2) TFORM17='210E' TDIM17='(210)' TTYPE17='N_II_245' / entire fieldname = N_II_2459 OFFSET17=13440 TUNIT17='cm*MJy/(nanowatts/m^2)' COMMENT 2589.6 GHz CH (J=2-1) line profile, in cm*MJy/(nanowatts/m^2) TFORM18='210E' TDIM18='(210)' TTYPE18='CH_2589' / entire fieldname = CH_2589 OFFSET18=14280 TUNIT18='cm*MJy/(nanowatts/m^2)' COMMENT END -------------------------------------------------------------------------------- Low Frequency Line Map SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'LLIN-MAP' / Low frequency line map EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HRES is a combination of COMMENT / the high resolution RLLF and LLLF data. For COMMENT / the uncombined channel/scan mode labels, the COMMENT / first two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented COMMENT COMMENT / Eight line frequencies represented in this map LINFRQ1 = 115.27 / CO (J=1-0) line frequency, in GHz LINFRQ2 = 230.54 / CO (J=2-1) line frequency, in GHz LINFRQ3 = 345.80 / CO (J=3-2) line frequency, in GHz LINFRQ4 = 424.75 / O2 line frequency, in GHz LINFRQ5 = 461.04 / CO (J=4-3) line frequency, in GHz LINFRQ6 = 492.23 / [C I] line frequency, in GHz LINFRQ7 = 556.89 / H2O line frequency, in GHz LINFRQ8 = 576.27 / CO (J=5-4) line frequency, in GHz END COMMENT COMMENT COMMENT FIRAS Low Frequency Line Emission Map COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Pixel weight TFORM4='1E' TTYPE4='WEIGHT' / entire fieldname = WEIGHT OFFSET4=12 TUNIT4=' ' COMMENT COMMENT Line Flux Parameters and Uncertainties COMMENT COMMENT Line flux, in nano-Watts/(m^2*sr) TFORM5='8E' TDIM5='(8)' TTYPE5='LINE_FLU' / entire fieldname = LINE_FLUX OFFSET5=16 TUNIT5='nano-Watts/(m^2*sr)' COMMENT Sigmas of line flux, in nano-Watts/(m^2*sr) TFORM6='8E' TDIM6='(8)' TTYPE6='LINE_FL2' / entire fieldname = LINE_FLUX_SIGMA OFFSET6=48 TUNIT6='nano-Watts/(m^2*sr)' COMMENT PEP gain sigmas of line flux, in nano-Watts/(m^2*sr) TFORM7='8E' TDIM7='(8)' TTYPE7='LINE_FL3' / entire fieldname = LINE_FLUX_PSIG OFFSET7=80 TUNIT7='nano-Watts/(m^2*sr)' COMMENT END -------------------------------------------------------------------------------- High Frequency Line Map SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'HLIN-MAP' / High frequency line map EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'HIGH' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. HRES is a combination of COMMENT / the high resolution RLLF and LLLF data. For COMMENT / the uncombined channel/scan mode labels, the COMMENT / first two characters of the label indicate the COMMENT / channel, the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented COMMENT NU_ZERO = 1800.0 / Characteristic freq of optical depth in GHz DUST_IND= 2.0 / Dust spectral index COMMENT / Ten line frequencies represented in this map LINFRQ1 = 691.47 / CO (J=6-5) line frequency, in GHz LINFRQ2 = 809.44 / [C I] line frequency, in GHz LINFRQ3 = 1113.3 / H2O line frequency, in GHz LINFRQ4 = 1461.1 / [N II] line frequency, in GHz LINFRQ5 = 1716.6 / H2O (J=2-1) line frequency, in GHz LINFRQ6 = 1900.5 / [C II] line frequency, in GHz LINFRQ7 = 2060.1 / [O I] line frequency, in GHz LINFRQ8 = 2311.7 / [Si I] line frequency, in GHz LINFRQ9 = 2459.4 / [N II] line frequency, in GHz LINFRQ10= 2589.6 / CH (J=2-1) line frequency, in GHz END COMMENT COMMENT COMMENT FIRAS High Frequency Line Emission Map COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Pixel weight TFORM4='1E' TTYPE4='WEIGHT' / entire fieldname = WEIGHT OFFSET4=12 TUNIT4=' ' COMMENT COMMENT Line Flux Parameters and Uncertainties COMMENT COMMENT Line flux, in nano-Watts/(m^2*sr) TFORM5='10E' TDIM5='(10)' TTYPE5='LINE_FLU' / entire fieldname = LINE_FLUX OFFSET5=16 TUNIT5='nano-Watts/(m^2*sr)' COMMENT Sigmas of line flux, in nano-Watts/(m^2*sr) TFORM6='10E' TDIM6='(10)' TTYPE6='LINE_FL2' / entire fieldname = LINE_FLUX_SIGMA OFFSET6=56 TUNIT6='nano-Watts/(m^2*sr)' COMMENT PEP gain sigmas of line flux, in nano-Watts/(m^2*sr) TFORM7='10E' TDIM7='(10)' TTYPE7='LINE_FL3' / entire fieldname = LINE_FLUX_PSIG OFFSET7=96 TUNIT7='nano-Watts/(m^2*sr)' COMMENT COMMENT Dust Model Parameters and Uncertainties COMMENT COMMENT Dust temperature, in K TFORM8='1E' TTYPE8='DUST_TEM' / entire fieldname = DUST_TEMP OFFSET8=136 TUNIT8='K' COMMENT Sigma of dust temperature, in K TFORM9='1E' TTYPE9='DUST_TE2' / entire fieldname = DUST_TEMP_SIGMA OFFSET9=140 TUNIT9='K' COMMENT Dust optical depth at 1800 GHz TFORM10='1E' TTYPE10='DUST_TAU' / entire fieldname = DUST_TAU OFFSET10=144 TUNIT10=' ' COMMENT Sigma of dust optical depth at 1800 GHz TFORM11='1E' TTYPE11='DUST_TA2' / entire fieldname = DUST_TAU_SIGMA OFFSET11=148 TUNIT11=' ' COMMENT Covariance of dust temperature and optical depth TFORM12='1E' TTYPE12='DUST_COV' / entire fieldname = DUST_COVAR OFFSET12=152 TUNIT12=' ' COMMENT END -------------------------------------------------------------------------------- Dust Spectrum Map SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'DUST-MAP' / Dust spectrum map EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. HIGH is a combination of COMMENT / the high frequency RHSS, RHSF, RHLF, LHSS, COMMENT / LHSF, and LHLF data. For the uncombined COMMENT / channel/scan mode labels, the first two COMMENT / characters of the label indicate the channel, COMMENT / the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented NU_ZERO = 68.020812 / Optical frequency of initial data point in GHz DELTA_NU= 13.604162 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END COMMENT COMMENT COMMENT FIRAS Dust Spectrum COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Pixel weight TFORM4='1E' TTYPE4='WEIGHT' / entire fieldname = WEIGHT OFFSET4=12 TUNIT4=' ' COMMENT Spectrum, in MJy/sr TFORM5='182E' TDIM5='(182)' TTYPE5='SPECTRUM' / entire fieldname = SPECTRUM OFFSET5=16 TUNIT5='MJy/sr' COMMENT END -------------------------------------------------------------------------------- CMBR Temperature Map SIMPLE = T / specifies FITS standard file BITPIX = 32 / if rasterized array follows, data 32-bit int NAXIS = 0 / no rasterized arrays follow EXTEND = T / Table extensions may follow ORIGIN = 'CDAC' / Cosmology Data Analysis Center TELESCOP= 'COBE' / COsmic Background Explorer satellite INSTRUME= 'FIRAS' / COBE instrument [DIRBE, DMR, FIRAS] OBJECT = 'ALL-SKY' / part of sky given [ALL-SKY, GAL-SLICE] PRODUCT = 'TEMP-MAP' / CMBR temperature map EQUINOX = 2000.0 / equinox of coords in following tables COMMENT REFERENC= 'For additional information, please refer to the' REFERENC= 'COBE Far Infrared Absolute Spectrophotometer (FIRAS)' REFERENC= 'Explanatory Supplement, ed. J.C. Mather et al,' REFERENC= 'COBE Ref. Pub. No. 97-C (Greenbelt, MD: NASA/GSFC),' REFERENC= 'available in electronic form from the NSSDC.' COMMENT COMMENT COBE specific keywords DATE-BEG= '24/11/89 '/ date of initial data represented (dd/mm/yy) DATE-END= '21/09/90 '/ date of final data represented (dd/mm/yy) PIXRESOL= 6 / Quad tree pixel resolution [6, 9] COMMENT COMMENT FIRAS specific keywords CHANSCAN= 'LOWF' / Field indicating combination of data from COMMENT / various channels and mirror transport COMMENT / mechanism scan modes. LOWF is a combination COMMENT / of the low frequency RLSS, RLFS, RLFL, LLSS, COMMENT / LLFS, and LLFL data. For the uncombined COMMENT / channel/scan mode labels, the first two COMMENT / characters of the label indicate the channel, COMMENT / the first being the instrument side: COMMENT / right (R) or left (L); and the second being COMMENT / the frequency: high (H) or low (L). The COMMENT / third and fourth characters indicate the scan COMMENT / mode, the third being the scan length: short COMMENT / (S) or long (L); and the fourth being the scan COMMENT / speed: slow (S) or fast (F). In addition, COMMENT / the scan mode may take the following values COMMENT / for low frequency data only (channel = RL or COMMENT / LL): COMMENT / FS: decimated SF data; COMMENT / FL: truncated LF data. MODLLABL= 'PASS4 '/ FIRAS calibration model solution label MISS_SEG= 'ENTIRE_MISSION '/ FIRAS segment of mission represented GALATEXC= 15 / Absolute value of galactic latitude in degrees COMMENT / below which input data was excluded in the COMMENT / dipole fit COMMENT COMMENT Results of CMBR temperature and dipole fit to temperature map: COMMENT CBR_TEMP= 2.727754 / CMBR temperature, in K CBR_SIG= 0.002 / CMBR temperature sigma, in mK DIP_AMP= 3.3506 / Dipole amplitude, in mK DIP_SIG= 0.006 / Dipole amplitude sigma, in mK DIP_LON= 264.98 / Dipole galactic longitude, in deg DIP_LAT= 47.92 / Dipole galactic latitude, in deg DIR_SIG= 0.09 / Dipole direction sigma, in deg RMS_TEMP= 0.214 / RMS temperature residual, in mK END COMMENT COMMENT COMMENT FIRAS CMBR Temperature Map COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT FIRAS pixel number (resolution 6) TFORM1='1J' TTYPE1='PIXEL' / entire fieldname = PIXEL OFFSET1=0 TUNIT1=' ' COMMENT Galactic longitude, in deg (0 -> 360) TFORM2='1E' TTYPE2='GAL_LON' / entire fieldname = GAL_LON OFFSET2=4 TUNIT2='deg' COMMENT Galactic latitude, in deg (-90 -> +90) TFORM3='1E' TTYPE3='GAL_LAT' / entire fieldname = GAL_LAT OFFSET3=8 TUNIT3='deg' COMMENT Pixel weight TFORM4='1E' TTYPE4='WEIGHT' / entire fieldname = WEIGHT OFFSET4=12 TUNIT4=' ' COMMENT CMBR temperature in pixel, in K TFORM5='1E' TTYPE5='TEMP' / entire fieldname = TEMP OFFSET5=16 TUNIT5='K' COMMENT Sigma of CMBR temperature in pixel, in K TFORM6='1E' TTYPE6='TEMP_SIG' / entire fieldname = TEMP_SIGMA OFFSET6=20 TUNIT6='K' COMMENT CMBR temperature residual in pixel, in K TFORM7='1E' TTYPE7='RESID_TE' / entire fieldname = RESID_TEMP OFFSET7=24 TUNIT7='K' COMMENT END