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WMAP Intensity Masks
FITS Header Information
The data made available through this page has been updated. The most recent version of this data may be accessed through /product/map/current/
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 = '2003-01-10T00:00:00' /file creation date (YYYY-MM-DDThh:mm:ss UT) TELESCOP= 'MAP ' / Microwave Anisotropy Probe OBJECT = 'ALL-SKY ' / Portion of sky given EQUINOX = 2000.0 / Equinox of coordinates COMMENT This file contains the MAP Kp2 intensity mask map COMMENT based on the first year of observations REFERENC= 'MAP Explanatory Supplement: http://lambda.gsfc.nasa.gov/ VERSION = 'PASS 1 ' / Internal MAP Version STARTGMT= '20012220000000000000' / Start time of TOD used ENDGMT = '20022212359000000000' / End time of TOD used FREQ = 'K band ' / Frequency band STOKES = 'Intensity' / i, q, or u RESOLUTN= 9 / Resolution index SKYCOORD= 'Galactic' / Coordinate system GALMASK = '/map/data/flight/pass1/ref/proc_mask_K_p8_v1_unsm.fits' / Galaxy mask PLANETS = 'MJSUN ' / Planets avoided COMMENT Planet codes: [M]ars, [J]upiter, [S]aturn, [U]ranus, [N]eptune SHIELDS = 'S ' / Shield angle avoidance COMMENT Shield codes: [S]un, [E]arth, [M]oon 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
Extension Header #1
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 ' /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 = '2003-01-10T00:00:00' /Table/MAP 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 TEMPERATURE is set to 0 for all pixels. This field COMMENT is filled only to provide consistent map format COMMENT N_obs is the boolean mask, where 0 means exclude, 1 means include END
More information concerning the format of this file is available.
