ABOUT LAMBDA

FITS Header

Primary Header

SIMPLE  =                    T / file does conform to FITS standard
BITPIX  =                   32 / 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    = '2012-07-09T15:58:19' /file creation date (YYYY-MM-DDThh:mm:ss UT)
TELESCOP= 'WMAP    '           /Wilkinson Microwave Anisotropy Probe
REFERENC= 'WMAP Explanatory Supplement:  http://lambda.gsfc.nasa.gov/' /
OBJECT  = 'ALL-SKY '           / Portion of sky given
EQUINOX =               2000.0 / Equinox of coordinates
COMMENT This file contains WMAP nine-year coadded 1 deg. smoothed Intensity (I)
COMMENT Res 9 skymap for the differencing assembly indicated by the
COMMENT DA keyword.
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)
STOKES  = 'I       '           /
DA      = 'Q1      '           /WMAP Differencing Assembly
FREQ    = 'Q band  '           /Frequency band
RELEASE = 'DR5     '           /WMAP Release
RESOLUTN=                    9 /Resolution Index
SIGMA0_I=        2.24539000000 /
COMMENT Pixel noise in mK may be evaluated from the Nobs field using
COMMENT the expression:
COMMENT sigma = sigma0/sqrt(Nobs)
COMMENT sigma0 applies to the entire map and is a scalar value listed
COMMENT in the header.
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  = 'E       '           / data format of field: 4-byte REAL
TUNIT1  = 'mK,thermodynamic'   / physical unit of field
TTYPE2  = 'N_OBS   '           / label for field   2
TFORM2  = 'E       '           / data format of field: 4-byte REAL
TUNIT2  = 'counts  '           / physical unit of field
EXTNAME = 'Archive Map Table'  / name of this binary table extension
DATE    = '2012-07-09T15:58:19' /file creation date (YYYY-MM-DDThh:mm:ss UT)
PIXTYPE = 'HEALPIX '           / Pixel algorithm
ORDERING= 'NESTED  '           / Ordering scheme
NSIDE   =                  512 / Resolution parameter
FIRSTPIX=                    0 / First pixel (0 based)
LASTPIX =              3145727 / Last pixel (0 based)
END

A service of the HEASARC and of the Astrophysics Science Division at NASA/GSFC
Goddard Space Flight Center, National Aeronautics and Space Administration
HEASARC Director: Dr. Alan P. Smale
LAMBDA Director: Dr. Eric R. Switzer
NASA Official: Dr. Eric R. Switzer
Web Curator: Mr. Michael R. Greason