FITS Headers
dmr_90a_imap_4yr.fits
Primary Header
SIMPLE = T / BITPIX = 16 / Number of bits per data pixel NAXIS = 0 / Number of data axes EXTEND = T / FITS data may contain extensions DATE = '2005-01-10' / Creation date (CCYY-MM-DD) of FITS header COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy COMMENT and Astrophysics', volume 376, page 359; bibcode 2001A&A...376..359H TELESCOP= 'COBE ' / INSTRUME= 'DMR ' / OBJECT = 'ALL-SKY ' / COMMENT COMMENT This file contains the COBE-DMR 4-year sky map for the 90 GHz COMMENT channel A data. This map was produced by Tony Banday and Gary COMMENT Hinshaw in 1998 as follows. The final 4-year time-ordered COMMENT differential data archive was converted to a calibrated archive COMMENT in FITS format (the DMR 'CIO' data). The WMAP prototype map-making COMMENT software was adapted to the DMR experiment and used to generate COMMENT these maps using the HEALPix tessellation of the sky. As a check, COMMENT the same archive and code were used to generate maps in the COMMENT original COBE quad-cube pixelization. These latter maps agreed with COMMENT the officially released COBE-DMR maps to numerical precision. COMMENT CHAN_ID = '90A ' / FREQ = '90 GHz ' / REFERENC= 'C.L.Bennett, et.al., ApJL, 1996, 464, L1' / REFERENC= 'A. Kogut, et al., ApJ, 1996, 470, 653' / REFERENC= 'E.L. Wright, et al., ApJL, 1996, 458, L53' / REFERENC= 'K.M. Gorski, et al., astro-ph/0409513' / STOKES = 'INTENSITY' / EQUINOX = 2000.00 / SKYCOORD= 'GALACTIC' / PIXTYPE = 'HEALPIX ' / ORDERING= 'NESTED ' / RESOLUTN= 5 / NSIDE = 32 / NPIX = 12288 / FIRSTPIX= 0 / LASTPIX = 12287 / DATE-BEG= '22/12/1989' /Data set start date JSTART = '1989356000000000' /Start time YYYYDDDHHMMSSHHH DATE-END= '21/12/1993' /Data set start date JSTOP = '1993355235959000' /Stop time YYYYDDDHHMMSSHHH 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. END
Extension Header 2
XTENSION= 'BINTABLE' /binary table extension BITPIX = 8 /8-bit bytes NAXIS = 2 /2-dimensional binary table NAXIS1 = 8 /width of table in bytes NAXIS2 = 12288 /number of rows in table PCOUNT = 0 /size of special data area GCOUNT = 1 /one data group (required keyword) TFIELDS = 2 /number of fields in each row TTYPE1 = 'TEMPERATURE ' / TFORM1 = 'E ' /Real*4 (floating point) TUNIT1 = 'mK,thermodynamic' /physical unit of field TTYPE2 = 'N_OBS ' / TFORM2 = 'E ' /Real*4 (floating point) TUNIT2 = 'counts ' /physical unit of field PIXTYPE = 'HEALPIX ' /HEALPIX pixelisation ORDERING= 'NESTED ' /Pixel ordering scheme, either RING or NESTED OBJECT = 'FULLSKY ' / COORDSYS= 'G ' /Pixelization coordinate system NSIDE = 32 /Healpix resolution parameter NPIX = 12288 /Total number of pixels FIRSTPIX= 0 /First pixel # (0 based) LASTPIX = 12287 /Last pixel # (zero based) INDXSCHM= 'IMPLICIT' /indexing : IMPLICIT or EXPLICIT GRAIN = 0 /GRAIN = 0: No index, COMMENT G = Galactic, E = ecliptic, C = celestial = equatorial COMMENT GRAIN =1: 1 pixel index for each pixel, COMMENT GRAIN >1: 1 pixel index for Grain consecutive pixels END
