WMAP FITS Header

Primary Header

SIMPLE  =                    T / file does conform to FITS standard
BITPIX  =                    8 / number of bits per data pixel
NAXIS   =                    0 / number of data axes
EXTEND  =                    T / FITS dataset may contain extensions
COMMENT   FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT   and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
DATE    = '2008-09-09T00:00:00' /file creation date (YYYY-MM-DDThh:mm:ss UT)
OBJECT  = 'ALL-SKY '           / Portion of sky given
COMMENT   This file defines the sky pixels excluded
COMMENT   by the WMAP intensity source mask for the 5-year data.
COMMENT   Excluded pixels have the field N_OBS set to 0.
COMMENT
COMMENT   See the WMAP Explanatory Supplement for further details.
REFERENC= 'WMAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/'
RELEASE = 'DR3     '           / WMAP release
VERSION = 'PASS 3  '           / Internal WMAP Version
RESOLUTN=                    9 / Resolution index
SKYCOORD= 'Galactic'           / Coordinate system
PIXTYPE = 'HEALPIX '           / Pixel algorithm
ORDERING= 'NESTED  '           / Ordering scheme
NSIDE   =                  512 / Resolution parameter
NPIX    =              3145728 / # of pixels
FIRSTPIX=                    0 / First pixel (0 based)
LASTPIX =              3145727 / Last pixel (0 based)
END

Archive 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  = '1E      '           /data format of field: 4-byte REAL
TUNIT1  = 'mK, thermodynamic'  /physical unit of field
TTYPE2  = 'N_OBS   '           /label for field   2
TFORM2  = '1E      '           /data format of field: 4-byte REAL
TUNIT2  = 'counts  '           /physical unit of field
EXTNAME = 'Archive Map Table'  /name of this binary table extension
DATE    = '2008-09-09T00:00:00' /Table creation date
PIXTYPE = 'HEALPIX '           /Pixel algorithm
ORDERING= 'NESTED  '           /Ordering scheme
NSIDE   =                  512 /Resolution parameter
FIRSTPIX=                    0 /First pixel (0 based)
LASTPIX =              3145727 /Last pixel (0 based)
COMMENT   The TEMPERATURE field is set to 0 for all pixels.
COMMENT   N_obs is the boolean mask, where 0 means exclude, 1 means include.
END