FITS Headers
lambda_haslam408_dsds.fits
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 = '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 COMMENT COMMENT *** End of mandatory fields *** COMMENT COMMENT COMMENT *** Column names *** COMMENT TTYPE1 = 'TEMPERATURE' /label for field 1 COMMENT COMMENT *** Column formats *** COMMENT TFORM1 = 'E ' /data format of field: 4-byte REAL TUNIT1 = 'K ' /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 = '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
