FITS Headers
wmap_iqumap_r9_yr1_W1_v4.fits
Primary Header
SIMPLE = T /FITS format
BITPIX = 16 /Dummy primary header
NAXIS = 0 /No data is associated with this header
EXTEND = T /Extensions may (will!) be present
RESOLUTN= 9 /Resolution Index
PIXTYPE = 'HEALPIX ' /Pixel algorigthm
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)
COMMENT This file contains WMAP Intensity and Polarization (I, Q, and U)
COMMENT Res 9 skymaps for the differencing assembly indicated by
COMMENT the DA keyword.
COMMENT The first year of data went into the map.
DATE = '2009-06-22T19:34:30' /file creation date (YYYY-MM-DDThh:mm:ss UT)
TELESCOP= 'WMAP ' /Wilkinson Microwave Anisotropy Probe
REFERENC= 'WMAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/' /
STOKES = 'IQU ' /
DA = 'V1 ' /WMAP Differencing Assembly
FREQ = 'V band ' /Frequency band
RELEASE = 'DR4 ' /WMAP Release
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 = 0 /
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 = 0 /
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