FITS Headers
firas_hpx_destriped_sky_spectra_lowf_v2.fits
Primary Header
SIMPLE = T / Written by IDL: Fri Oct 26 12:11:20 2018 BITPIX = 8 / number of bits per data pixel NAXIS = 0 / number of data axes EXTEND = T / FITS dataset may contain extensions COMMENT FITS (Flexible Image Transport System) format defined in Astronomy and COMMENT Astrophysics Supplement Series v44/p363, v44/p371, v73/p359, v73/p365. COMMENT Contact the NASA Science Office of Standards and Technology for the COMMENT FITS Definition document #100 and other FITS information. DATE = '2006-07-05' / FITS file creation date (yyyy-mm-dd) ORIGIN = 'LAMBDA ' / Legacy Archive for Microwave Background Data COMMENT / Analysis 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-HPX' / Destriped sky spectra, HEALPix Version EQUINOX = 2000.00 / 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 and LAMBDA.' / COMMENT COMMENT HEALPix specific keywords PIXTYPE = 'HEALPIX ' / Pixel algorigthm ORDERING= 'NESTED ' / Ordering scheme RESOLUTN= 4 /Resolution index NSIDE = 16 /Resolution parameter NPIX = 3072 /# of pixels FIRSTPIX= 0 /First pixel (0 based) LASTPIX = 3071 /Last pixel (0 based) 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) 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 = 68.0208120000 / Optical frequency of initial data point in GHz DELTA_NU= 13.6041620000 / Optical frequency interval between data points COMMENT / in GHz NUM_FREQ= 43 / Number of frequency points with good data END
Extension Header 2
XTENSION= 'BINTABLE' / Extension type is Binary Table BITPIX = 8 / Binary data NAXIS = 2 / Data are in a table NAXIS1 = 745 / Number of 8 bit bytes in each row NAXIS2 = 3072 / Number of rows PCOUNT = 0 / Number of bytes of data following table GCOUNT = 1 / Group count (always 1 for bintable extensions) TFIELDS = 6 / Number of fields (columns) in the table COMMENT COMMENT COMMENT FIRAS Destriped Sky Spectrum COMMENT Project Dataset Record Structure COMMENT COMMENT COMMENT HEALPix pixel number (resolution 4) TFORM1 = 'J ' / TTYPE1 = 'PIXEL ' / entire fieldname = PIXEL TUNIT1 = ' ' / COMMENT Galactic longitude, in deg (0 -> 360) TFORM2 = 'E ' / TTYPE2 = 'GAL_LON ' / entire fieldname = GAL_LON TUNIT2 = 'deg ' / COMMENT Galactic latitude, in deg (-90 -> 90) TFORM3 = 'E ' / TTYPE3 = 'GAL_LAT ' / entire fieldname = GAL_LAT TUNIT3 = 'deg ' / COMMENT Pixel weight TFORM4 = 'E ' / TTYPE4 = 'WEIGHT ' / entire fieldname = WEIGHT 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 = 'B ' / TTYPE5 = 'STR_USED ' / entire fieldname = STR_USED TUNIT5 = ' ' / COMMENT Destriped spectrum, in MJy/sr TFORM6 = '182E ' / TDIM6 = '(182) ' / TTYPE6 = 'SPECTRUM ' / entire fieldname = SPECTRUM TUNIT6 = 'MJy/sr ' / COMMENT END
