FITS Headers
wmap_iqusmap_r4_yr4_Q2_v5.fits
Primary Header
SIMPLE = T /FITS format BITPIX = 32 /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 Intensity and Polarization (I, Q, U, and S) 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/' / STOKES = 'IQUS ' / DA = 'Q2 ' /WMAP Differencing Assembly FREQ = 'Q band ' /Frequency band RELEASE = 'DR5 ' /WMAP Release DATE = '2012-07-05T22:26:13' /file creation date (YYYY-MM-DDThh:mm:ss UT) SIGMA0_I= 2.13108000000 / SIGMA0_Q= 2.13953000000 / SIGMA0_U= 2.13953000000 / SIGMA0_S= 2.13953000000 / 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 = 20 /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 = 5 /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 = 'SPUR_SIGNAL' / TFORM4 = 'E ' / TUNIT4 = 'mK,thermodynamic' / TTYPE5 = 'N_OBS ' / TFORM5 = 'E ' / TUNIT5 = 'counts ' / 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 = 28 /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 = 7 /number of fields in each row TTYPE1 = 'N_OBS ' / TFORM1 = 'E ' / TTYPE2 = 'M11 ' / TFORM2 = 'E ' / TUNIT2 = 'counts ' / TTYPE3 = 'M12 ' / TFORM3 = 'E ' / TUNIT3 = 'counts ' / TTYPE4 = 'M13 ' / TFORM4 = 'E ' / TUNIT4 = 'counts ' / TTYPE5 = 'M23 ' / TFORM5 = 'E ' / TUNIT5 = 'counts ' / TTYPE6 = 'M22 ' / TFORM6 = 'E ' / TUNIT6 = 'counts ' / TTYPE7 = 'M33 ' / TFORM7 = 'E ' / TUNIT7 = '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
