WMAP Simulated Foreground Reduced Single Year I Map Per Differencing Assembly
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 foreground cleaned WMAP Intensity (I) Res 9
COMMENT skymap for the differencing assembly indicated by the DA keyword.
COMMENT Simulated data was used to construct this map!
COMMENT The second year of data went into the map.
DATE    = '        '           /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      = 'Q1      '           /WMAP Differencing Assembly
FREQ    = 'Q band  '           /Frequency band
RELEASE = 'DR4     '           /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)
DATE    = '        '           /file creation date (YYYY-MM-DDThh:mm:ss UT)
END

More information concerning the contents of this file is available.