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    = '2003-06-27T00:00:00' /file creation date (YYYY-MM-DDThh:mm:ss UT)
OBJECT  = 'ALL-SKY '           / Portion of sky given
COMMENT   This file defines the sky coordinate boundaries of each of the 12
COMMENT   regions used to compute the WMAP Internal Linear Combination (ILC)
COMMENT   map, numbered from 0-11.  For each pixel, the N_OBS field is given the
COMMENT   value of the region to which it belongs.  Weights for each of the
COMMENT   5 WMAP frequencies are determined separately for each region.  The
COMMENT   K,Ka,Q,V,W weights used for each region are:
COMMENT      region 0:   0.10876  -0.68367  -0.09579   1.92141  -0.25072
COMMENT      region 1:   0.10818  -0.67987  -0.09017   1.96859  -0.30674
COMMENT      region 2:  -0.04074  -0.28682   0.08476   1.16221   0.08061
COMMENT      region 3:  -0.01847  -0.25533  -0.02607   0.83919   0.46068
COMMENT      region 4:   0.18610  -0.77416  -0.32352   2.33978  -0.42820
COMMENT      region 5:  -0.02158  -0.21880  -0.08224   0.84851   0.47412
COMMENT      region 6:   0.11790  -0.67740  -0.09117   1.94830  -0.29763
COMMENT      region 7:   0.12403  -0.67639  -0.09653   1.74992  -0.10103
COMMENT      region 8:   0.10500  -0.68438  -0.09847   1.90588  -0.22803
COMMENT      region 9:   0.16911  -0.91455  -0.01204   2.64536  -0.88788
COMMENT     region 10:   0.21951  -0.96567  -0.18077   2.38740  -0.46046
COMMENT     region 11:   0.11101  -0.67501   0.05268   1.59101  -0.07970
COMMENT
COMMENT   See the WMAP Explanatory Supplement for further details.
REFERENC= 'WMAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/
VERSION = 'PASS 1  '           / Internal MAP 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    = '2003-06-27T00:00:00' /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 defines the ILC regions 0-11.  Each pixel value corresponds
COMMENT    to the numerical value of the region to which the pixel belongs.
END