WMAP I Map Per Differencing Assembly Five Year FITS Header Information

The maps are contained in a binary table TEMPERATURE and N_OBS columns.

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
FIRSTPIX=                    0 /First pixel (0 based)
LASTPIX =              3145727 /Last pixel (0 based)
COMMENT This file contains a WMAP Intensity (I) Res 9 skymap for the
COMMENT differencing assembly indicated by the DA keyword.
COMMENT Five years of data went into the map.
DATE    = '2007-12-18T18:08:26' /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  = 'I       '           /
DA      = 'K1      '           /WMAP Differencing Assembly
FREQ    = 'K band  '           /Frequency band
RELEASE = 'DR3     '           /WMAP Release
END

Temperature Map Table

XTENSION= 'BINTABLE'           /binary table extension
BITPIX  =                    8 /8-bit bytes
NAXIS   =                    2 /2-dimensional binary table
NAXIS1  =                    8 /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 =                    2 /number of fields in each row
TTYPE1  = 'TEMPERATURE '       /label for field 1
TFORM1  = 'E       '           /data format of field: 4-byte REAL
TUNIT1  = 'mK      '           /physical unit of field 1
TTYPE2  = 'N_OBS   '           /label for field 2
TFORM2  = 'E       '           /data format of field: 4-byte REAL
TUNIT2  = 'counts  '           /physical unit of field 2
EXTNAME = 'Archive Map Table'  /name of this binary table extension
PIXTYPE = 'HEALPIX '           /Pixel algorigthm
ORDERING= 'NESTED  '           /Ordering scheme
NSIDE   =                  512 /Resolution parameter
FIRSTPIX=                    0 /First pixel (0 based)
LASTPIX =              3145727 /Last pixel (0 based)
END

More information concerning the contents of this file is available.