FITS Headers
wmap_smth_iqumap_r9_9yr_W2_v5.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 is defined in 'Astronomy COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H DATE = '2012-07-09T15:59:53' /file creation date (YYYY-MM-DDThh:mm:ss UT) TELESCOP= 'WMAP ' /Wilkinson Microwave Anisotropy Probe COMMENT This file contains WMAP nine-year coadded 1 deg. smoothed Intensity and COMMENT Polarization (I, Q, and U) Res 9 skymaps for the differencing assembly i COMMENT by the DA keyword. REFERENC= 'WMAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/' / OBJECT = 'ALL-SKY ' / Portion of sky given EQUINOX = 2000.0 / Equinox of coordinates PIXTYPE = 'HEALPIX ' / Pixel algorithm ORDERING= 'NESTED ' / Ordering scheme NSIDE = 512 /Resolution Parameter NPIX = 3145728 /Number of pixels FIRSTPIX= 0 /First pixel (0 based) LASTPIX = 3145727 /Last pixel (0 based) STOKES = 'IQU ' / DA = 'W2 ' /WMAP Differencing Assembly FREQ = 'W band ' /Frequency band RELEASE = 'DR5 ' /WMAP Release RESOLUTN= 9 /Resolution Index SIGMA0_I= 6.56220000000 / SIGMA0_Q= 6.57708000000 / SIGMA0_U= 6.57708000000 / COMMENT Pixel noise in mK may be evaluated from the Nobs field using COMMENT the expression: COMMENT sigma = sigma0/sqrt(Nobs) COMMENT sigma0 applies to the entire map and is a scalar value listed COMMENT in the header. END
Stokes Maps
XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 16 / width of table in bytes NAXIS2 = 3145728 / number of rows in table PCOUNT = 0 / size of special data area GCOUNT = 1 / one data group (required keyword) TFIELDS = 4 / number of fields in each row TTYPE1 = 'TEMPERATURE' / TFORM1 = 'E ' / TUNIT1 = 'mK,thermodynamic' / TTYPE2 = 'Q_POLARISATION' / TFORM2 = 'E ' / TUNIT2 = 'mK,thermodynamic' / TTYPE3 = 'U_POLARISATION' / TFORM3 = 'E ' / TUNIT3 = 'mK,thermodynamic' / TTYPE4 = 'N_OBS ' / TFORM4 = 'E ' / TUNIT4 = 'counts ' / EXTNAME = 'Stokes Maps' / DATE = '2012-07-09T00:25:46' / PIXTYPE = 'HEALPIX ' / ORDERING= 'NESTED ' / NSIDE = 512 / FIRSTPIX= 0 / LASTPIX = 3145727 / END
Weight Arrays
XTENSION= 'BINTABLE' / binary table extension BITPIX = 8 / 8-bit bytes NAXIS = 2 / 2-dimensional binary table NAXIS1 = 16 / width of table in bytes NAXIS2 = 3145728 / number of rows in table PCOUNT = 0 / size of special data area GCOUNT = 1 / one data group (required keyword) TFIELDS = 4 / number of fields in each row TTYPE1 = 'N_OBS ' / TFORM1 = 'E ' / TTYPE2 = 'QQ ' / TFORM2 = 'E ' / TUNIT2 = 'counts ' / TTYPE3 = 'QU ' / TFORM3 = 'E ' / TUNIT3 = 'counts ' / TTYPE4 = 'UU ' / TFORM4 = 'E ' / TUNIT4 = 'counts ' / EXTNAME = 'Weight Arrays' / DATE = '2012-07-09T00:25:46' / PIXTYPE = 'HEALPIX ' / ORDERING= 'NESTED ' / NSIDE = 512 / FIRSTPIX= 0 / LASTPIX = 3145727 / 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
