FITS Headers
wmap_poln_dust_templates_r4_v2.fits
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 = '2006-03-14T00:00:00' /file creation date (YYYY-MM-DDThh:mm:ss UT) OBJECT = 'ALL-SKY ' / Portion of sky given COMMENT This file contains the D3 dust templates used by the WMAP team in the COMMENT removal of Galactic foregrounds from the 3-year Polarization maps. The COMMENT Q and U templates are constructed by using a model for the dust COMMENT intensity (FDS dust model 8 evaluated at 94 Ghz, Finkbeiner COMMENT Davis & Schlegel 1999) and the smoothed polarization COMMENT direction from combined starlight polarization data. The templates COMMENT are in arbitrary units, HEALPix projection with Nside = 16. COMMETN Further details can be found in Page etal (2006). COMMENT This file is distributed and maintained by LAMBDA. REFERENC= 'Legacy Archive for Microwave Background Data Analysis (LAMBDA) ' REFERENC= ' http://lambda.gsfc.nasa.gov/ ' REFERENC= 'Three-Year WMAP Observations: Polarization Analysis, ' REFERENC= ' Page et al. 2006 ' REFERENC= 'Extrapolation of Galactic Dust Emission at 100 microns to Cosmic ' REFERENC= ' Microwave Background Radiation Frequencies using FIRAS' REFERENC= ' Finkbeiner, Davis & Schlegel 1999 ApJ 524, 867 ' REFERENC= 'Berkeley mirror site for FDS99 data: REFERENC= ' http://astron.berkeley.edu/dust/' REFERENC= 'HEALPix Home Page: http://www.eso.org/science/healpix/ ' RELEASE = 'DR2 ' /WMAP Release STOKES = 'QU ' / RESOLUTN= 4 / Resolution index SKYCOORD= 'Galactic' / Coordinate system PIXTYPE = 'HEALPIX ' / Pixel algorithm ORDERING= 'NESTED ' / Ordering scheme NSIDE = 16 / Resolution parameter NPIX = 3072 / # of pixels FIRSTPIX= 0 / First pixel (0 based) LASTPIX = 3071 / Last pixel (0 based) END
Stokes Maps
XTENSION= 'BINTABLE' /binary table extension BITPIX = 8 /8-bit bytes NAXIS = 2 /2-dimensional binary table NAXIS1 = 16 /width of table in bytes NAXIS2 = 3072 /number of rows in table PCOUNT = 0 /size of special data area GCOUNT = 1 /one data group (required keyword) TFIELDS = 4 /number of fields in each row TTYPE1 = 'TEMPERATURE ' /label for field 1 TFORM1 = 'E ' /data format of field: 4-byte REAL TUNIT1 = 'none ' /physical unit of field TTYPE2 = 'Q_POLARISATION ' /label for field 2 TFORM2 = 'E ' /data format of field: 4-byte REAL TUNIT2 = 'arbitrary units' /physical unit of field TTYPE3 = 'U_POLARISATION ' /label for field 3 TFORM3 = 'E ' /data format of field: 4-byte REAL TUNIT3 = 'arbritrary units' /physical unit of field TTYPE4 = 'N_OBS ' /label for field 2 TFORM4 = 'E ' /data format of field: 4-byte REAL TUNIT4 = 'counts ' /physical unit of field EXTNAME = 'Stokes Maps' /name of this binary table extension DATE = '2006-03-14T00:00:00' /Table creation date PIXTYPE = 'HEALPIX ' /Pixel algorithm ORDERING= 'NESTED ' /Ordering scheme NSIDE = 16 /Resolution parameter FIRSTPIX= 0 /First pixel (0 based) LASTPIX = 3071 /Last pixel (0 based) COMMENT The full-sky Q and U templates are contained in the Q_POLARISATION COMMENT and U_POLARISATION fields. COMMENT The TEMPERATURE field contains all zeroes and is filled only COMMENT to provide a format consistent with that used by WMAP products. 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
