FITS Headers
lambda_Wco_DT2022.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 = '2024-02-14T00:00:00' /file creation date (YYYY-MM-DDThh:mm:ss UT) OBJECT = 'ALL-SKY ' / Portion of sky given COMMENT This file contains data from the composite CO 1-0 line survey release COMMENT of Dame and Thaddeus (2022). Data are a merge of the Galactic plane COMMENT CO survey of Dame, Hartmann & Thaddeus (2001), and subsequent COMMENT complementary coverage of the entire northern sky (decl > -17 deg) COMMENT using the same telescope. The merged survey is released by the COMMENT authors in the form of CO line spectral data cubes. COMMENT To create this file, the moment-masked data cube for the combined COMMENT survey was obtained from the CfA Millimeter Wave Group website COMMENT (see ref below) and integrated over +/- 36 km/sec. The velocity COMMENT integrated intensity map in rectilinear coordinates was then COMMENT interpolated onto a HEALPix grid with Nside=256. 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= 'A CO Survey of the Entire Northern Sky, REFERENC= 'Dame & Thaddeus 2022 ApJS, 262, 5. REFERENC= 'The Milky Way in Molecular Clouds: A New Complete CO Survey, REFERENC= 'Dame, Hartmann & Thaddeus 2001 ApJ, 547, 792. REFERENC= 'Harvard-Smithsonian Center for Astrophysics Millimeter Wave Group: REFERENC= ' https://lweb.cfa.harvard.edu/mmw/ REFERENC= 'HEALPix Home Page: https://healpix.jpl.nasa.gov/ FREQ = '115 GHz CO 1-0 line'/ Frequency band RESOLUTN= 8 / Resolution index SKYCOORD= 'Galactic' / Coordinate system PIXTYPE = 'HEALPIX ' / Pixel algorithm ORDERING= 'NESTED ' / Ordering scheme NSIDE = 256 / Resolution parameter NPIX = 786432 / # of pixels FIRSTPIX= 0 / First pixel (0 based) LASTPIX = 786431 / 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 = 786432 / 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 = 'K km s-1' / 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 = '2024-02-14T00:00:00' / Table creation date PIXTYPE = 'HEALPIX ' / Pixel algorithm ORDERING= 'NESTED ' / Ordering scheme INDXSCHM= 'IMPLICIT' / indexing implicit for full sky map NSIDE = 256 / Resolution parameter FIRSTPIX= 0 / First pixel (0 based) LASTPIX = 786431 / Last pixel (0 based) COMMENT The TEMPERATURE field contains the velocity integrated main beam COMMENT brightness temperature, W(CO), in K km/sec. COMMENT N_obs is set to 1 for those pixels for which survey data were COMMENT available. Otherwise, N_obs is set to 0. END
