FITS Headers
DMR_FREE_4YR.FITS
Primary Header
SIMPLE = T / file does conform to FITS standard BITPIX = 32 / 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 = '02/08/95' / FITS file creation date (dd/mm/yy) COMMENT FITS optional reserved keywords: DATE-MAP= '31/07/95' / Date when the sky maps were created ORIGIN = 'CDAC ' / NASA Cosmology Data Analysis Center TELESCOP= 'COBE ' / Cosmic Background Explorer INSTRUME= 'DMR ' / Differential Microwave Radiometers OBJECT = 'ALL-SKY ' / EQUINOX = 2000.0 / REFERENC= 'C.L.Bennett, et al., 1995, COBE Preprint 95-04.' / COMMENT Other related references: COMMENT 'C.L.Bennett, et al., 1994, APJ, 436, 423.' COMMENT 'G.F.Smoot, et al., 1992, APJ, 396, L1.' COMMENT 'C.L.Bennett, et al., 1992a, APJ, 391, 466.' COMMENT 'C.L.Bennett, et al., 1992b, APJ, 396, L7.' COMMENT 'E.L.Wright, et al., 1992, APJ, 396, L13.' COMMENT 'A.Kogut, et al., 1992, APJ, 401, 1.' COMMENT 'G.F.Smoot, et al., 1990, APJ, 360, 685.' COMMENT 'M.A.Janssen and S.Gulkis, 1992, in "The Infrared and Submillimeter COMMENT Sky after COBE", eds. M.Signore and C.Dupraz (Dordrecht: Kluwer).' COMMENT COBE/DMR specific keywords: CHAN_ID = '53 ' / DMR Channel name COMMENT Channel name is one of 31A, 31B, 53A, 53B, 90A, 90B, COMBINED COMMENT or 53, where COMBINED represents a combination of six channel COMMENT maps, CHAN_ID=53 represents the various Galaxy model maps COMMENT derived at 53 GHz frequency. COMMENT The thermodynamic and antenna temperature scales are related by COMMENT a frequency-dependent factor corresponding to the deviation of the COMMENT Rayleigh-Jeans law from the Planck function. See DMR calibration COMMENT paper (Bennett et.al., 1992, APJ, 391, 466) for details. TEMPTYPE= 'ANTENNA ' / Scale used for temperature fields, COMMENT / one of 'ANTENNA ' or 'THERMO ' FREQ = 5.3E+10 / Frequency in Hz to which data have been scaled WGT_31 = 0.499150 / Weight used for 31 GHz channel when combining WGT_53 = -0.523000 / Weight used for 53 GHz channel when combining MAP_TYPE= 'FREE ' / Free-Free map at 53 GHz COMMENT Free-free map is derived from combining 31 and 53 channel maps with COMMENT synchrotron and dust emission already subtracted. COORDSYS= 'E ' / Pixelization coordinate system COMMENT Coordinate system is one of E = Ecliptic, G = Galactic, COMMENT C = Celestial, i.e. Equatorial, or S = Special PIXRESOL= 6 / Quad tree pixel resolution DATE-BEG= '22/12/89' / Data set start date JSTART = '89356000000000' / Start time YYDDDHHMMSSHHH DATE-END= '21/12/93' / Data set stop date JSTOP = '93355235959000' / Stop time YYDDDHHMMSSHHH COMMENT DATE-BEG and DATE-END give the date during which COMMENT the earliest and the latest data used in this product COMMENT were obtained COMMENT JSTART and JSTOP delimit in a form expected by COBE software COMMENT the interval of time during which the data used COMMENT in this product were obtained BASELINE= 'MEAN ' / Baseline used RMS = 22.5931 / RMS noise level (mK in 0.5 sec) COR_MAGS= T / If "T", magnetic susceptibility corrected COR_MEMO= T / If "T", LIA memory corrected COR_ECLI= T / If "T", eclipse effect corrected COR_EART= F / If "T", Earth limb corrected COR_MOON= T / If "T", Moon corrected COR_MARS= T / If "T", Mars corrected COR_JUPI= T / If "T", Jupiter corrected COR_SATU= T / If "T", Saturn corrected VEL_SUN = T / If "T", Sun velocity corrected VEL_EART= T / If "T", Earth velocity corrected VEL_COBE= T / If "T", satellite velocity corrected END
DMR_SKYMAP
XTENSION= 'BINTABLE' / Extension type is Binary Table BITPIX = 8 / Binary data NAXIS = 2 / Data are in a table NAXIS1 = 40 / Number of 8 bit bytes in each row NAXIS2 = 6144 / Number of rows PCOUNT = 0 / Number of bytes of data following table GCOUNT = 1 / Group count (always 1 for bintable extensions) TFIELDS = 10 / Number of fields (columns) in the table COMMENT DMR Analyzed Science Data Set FITS Skymap COMMENT EXTNAME = 'DMR_SKYMAP' / name of this binary table extension COMMENT COMMENT Pixel number TFORM1 = '1J ' / data format of the field: 4-byte INTEGER TTYPE1 = 'PIXEL ' / entire fieldname = PIXEL TUNIT1 = ' ' / COMMENT COMMENT Antenna temperature for this pixel in mK TFORM2 = '1E ' / data format of the field: 4-byte REAL TTYPE2 = 'SIGNAL ' / entire fieldname = SIGNAL TUNIT2 = 'mK ' / physical unit of field COMMENT COMMENT Number of observations for this pixel TFORM3 = '1J ' / data format of the field: 4-byte INTEGER TTYPE3 = 'N_OBS ' / entire fieldname = N_OBS TUNIT3 = ' ' / COMMENT COMMENT Estimated pixel uncertainty COMMENT as RMS/SQRT(N_OBS) TFORM4 = '1E ' / data format of the field: 4-byte REAL TTYPE4 = 'SERROR ' / entire fieldname = SERROR TUNIT4 = 'mK ' / physical unit of field COMMENT COMMENT The following geometric quantities refer to the nominal COMMENT pixel center, not the average of actual lines of sight. COMMENT COMMENT Ecliptic longitude of pixel center in degrees (0, 360) TFORM5 = '1E ' / data format of the field: 4-byte REAL TTYPE5 = 'ECLON ' / entire fieldname = ECLON TUNIT5 = 'DEGREES ' / physical unit of field COMMENT COMMENT Ecliptic latitude of pixel center in degrees (-90, 90) TFORM6 = '1E ' / data format of the field: 4-byte REAL TTYPE6 = 'ECLAT ' / entire fieldname = ECLAT TUNIT6 = 'DEGREES ' / physical unit of field COMMENT COMMENT Galactic longitude of pixel center in degrees (0, 360) TFORM7 = '1E ' / data format of the field: 4-byte REAL TTYPE7 = 'GALON ' / entire fieldname = GALON TUNIT7 = 'DEGREES ' / physical unit of field COMMENT COMMENT Galactic latitude of pixel center in degrees (-90, 90) TFORM8 = '1E ' / data format of the field: 4-byte REAL TTYPE8 = 'GALAT ' / entire fieldname = GALAT TUNIT8 = 'DEGREES ' / physical unit of field COMMENT COMMENT Right ascension of pixel center in degrees (0, 360) TFORM9 = '1E ' / data format of the field: 4-byte REAL TTYPE9 = 'RA ' / entire fieldname = RA TUNIT9 = 'DEGREES ' / physical unit of field COMMENT COMMENT Declination of pixel center in degrees (-90, 90) TFORM10 = '1E ' / data format of the field: 4-byte REAL TTYPE10 = 'DEC ' / entire fieldname = DEC TUNIT10 = 'DEGREES ' / physical unit of field COMMENT END
