FITS Headers
wmap_qumap_r4_yr4_W2_v3.fits
Primary Header
SIMPLE = T / file does conform to FITS standard 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 is defined in 'Astronomy COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H DATE = '2007-10-29T22:49:37' /file creation date (YYYY-MM-DDThh:mm:ss UT) TELESCOP= 'WMAP ' /Wilkinson Microwave Anisotropy Probe OBJECT = 'ALL-SKY ' / Portion of sky given EQUINOX = 2000.0 / Equinox of coordinates COMMENT This file contains WMAP Intensity and Polarization (Q and U) COMMENT Res 4 skymaps for the differencing assembly indicated by COMMENT the DA keyword. COMMENT The fourth year of data went into the map. REFERENC= 'WMAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/' / DA = 'W2 ' /WMAP Differencing Assembly FREQ = 'W band ' /Frequency band STOKES = 'QU ' / i, q, or u RELEASE = 'DR3 ' /WMAP Release RESOLUTN= 4 /Resolution Index PIXTYPE = 'HEALPIX ' / Pixel algorithm ORDERING= 'NESTED ' / Ordering scheme NSIDE = 16 /Resolution Parameter NPIX = 3072 /Number of pixels FIRSTPIX= 0 /First pixel (0 based) LASTPIX = 3071 /Last pixel (0 based) END
Stokes Maps
XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 8 / width of table in bytes NAXIS2 = 3072 / 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 = 'Q_POLARISATION ' / TFORM1 = 'E ' / TUNIT1 = 'mK,thermodynamic' / TTYPE2 = 'U_POLARISATION ' / TFORM2 = 'E ' / TUNIT2 = 'mK,thermodynamic' / EXTNAME = 'Stokes Maps' / DATE = '2007-10-29T18:49:50' / PIXTYPE = 'HEALPIX ' / ORDERING= 'NESTED ' / NSIDE = 16 / FIRSTPIX= 0 / LASTPIX = 3071 / END
Weight Arrays
XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 12 / width of table in bytes NAXIS2 = 3072 / number of rows in table PCOUNT = 0 / size of special data area GCOUNT = 1 / one data group (required keyword) TFIELDS = 3 / number of fields in each row TTYPE1 = 'QQ ' / TFORM1 = 'E ' / TUNIT1 = 'counts ' / TTYPE2 = 'QU ' / TFORM2 = 'E ' / TUNIT2 = 'counts ' / TTYPE3 = 'UU ' / TFORM3 = 'E ' / TUNIT3 = 'counts ' / EXTNAME = 'Weight Arrays' / DATE = '2007-10-29T18:49:50' / PIXTYPE = 'HEALPIX ' / ORDERING= 'NESTED ' / NSIDE = 16 / FIRSTPIX= 0 / LASTPIX = 3071 / COMMENT Weight arrays must be divided by a scaling factor sigma_0^2 COMMENT to provide a weight array in physical units (mK^-2). See WMAP COMMENT Explanatory Supplement. END
