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    = '2003-02-05T00:00:00' /file creation date (YYYY-MM-DDThh:mm:ss UT)
OBJECT  = 'ALL-SKY '           / Portion of sky given
COMMENT   This file contains data from the Haslam 408 MHz radio continuum
COMMENT   sky survey.  The survey data were obtained from the archives of the
COMMENT   NCSA ADIL in equatorial 1950 coordinates, and subsequently processed
COMMENT   further in the Fourier domain to mitigate baseline striping and strong
COMMENT   point sources.  The data were then interpolated onto a Galactic
COMMENT   coordinate system and HEALPix projection.  This file is distributed
COMMENT   and maintained by LAMBDA.
REFERENC= 'Legacy Archive for Microwave Background Data Analysis (LAMBDA)
REFERENC= '                http://lambda.gsfc.nasa.gov/
REFERENC= 'A 408 MHz All-Sky Continuum Survey. II. The Atlas of Contour Maps.,
REFERENC= 'Haslam, Stoffel, Salter & Wilson 1982 A&AS, 47, 1.
REFERENC= 'NCSA Astronomy Digital Image Library: http://adil.ncsa.uiuc.edu/
REFERENC= 'HEALPix Home Page: http://www.eso.org/science/healpix/
FREQ    = '408 MHz'            / Frequency band
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  = 'K       '           /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    = '2003-02-05T00:00:00' /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   N_obs is set to 1 for all pixels. The N_obs field is filled
COMMENT    only to provide a format consistent with that used by
COMMENT    WMAP products.
END