FITS Headers
lambda_sfd_ebv.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 an all-sky Galactic reddening map, E(B-V), based on COMMENT the derived reddening maps of Schlegel, Finkbeiner and Davis (1998). COMMENT Software and data files downloaded from their website were used to COMMENT interpolate their high resolution dust maps onto pixel centers COMMENT appropriate for a HEALPix Nside=512 projection in Galactic COMMENT coordinates. This file is distributed and maintained by LAMBDA. REFERENC= 'Legacy Archive for Microwave Background Data Analysis (LAMBDA) ' REFERENC= ' http://lambda.gsfc.nasa.gov/ ' REFERENC= 'Maps of Dust Infrared Emission for Use in Estimation of Reddening an' REFERENC= ' Cosmic Microwave Background Radiation Foregrounds', ' REFERENC= ' Schlegel, Finkbeiner & Davis 1998 ApJ 500, 525 ' REFERENC= 'Berkeley mirror site for SFD98 data: http://astron.berkeley.edu/dust' REFERENC= 'Princeton mirror site for SFD98 data: ' REFERENC= ' http://astro/princeton.edu/~schlegel/dust' REFERENC= 'HEALPix Home Page: http://www.eso.org/science/healpix/ ' 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 = 'magnitudes' /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 The TEMPERATURE field contains E(B-V) in magnitudes. 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
