FITS Headers
wmap_qumap_r4_yr5_W2_v5.fits
Primary Header
SIMPLE = T /FITS format BITPIX = 8 /Dummy primary header NAXIS = 0 /No data is associated with this header EXTEND = T /Extensions may (will!) be present RESOLUTN= 4 /Resolution Index PIXTYPE = 'HEALPIX ' /Pixel algorigthm 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) TELESCOP= 'WMAP ' /Wilkinson Microwave Anisotropy Probe COMMENT This file contains WMAP Polarization (Q and U) Res 4 COMMENT 4 skymaps for the differencing assembly indicated by COMMENT the DA keyword. COMMENT The fifth year of data went into the map. REFERENC= 'WMAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/' / STOKES = 'QU ' / DA = 'W2 ' /WMAP Differencing Assembly FREQ = 'W band ' /Frequency band RELEASE = 'DR5 ' /WMAP Release DATE = '2012-07-05T22:31:53' /file creation date (YYYY-MM-DDThh:mm:ss UT) 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 = 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 = 0 / 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 = 0 / 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
