FITS Headers
class_dr1_40GHz_skymap_m1_n128.fits
Primary Header
SIMPLE = T / conforms to FITS standard
BITPIX = 8 / array data type
NAXIS = 0 / number of array dimensions
EXTEND = T
END
xtension
XTENSION= 'BINTABLE' / binary table extension
BITPIX = 8 / array data type
NAXIS = 2 / number of array dimensions
NAXIS1 = 36864 / length of dimension 1
NAXIS2 = 192 / length of dimension 2
PCOUNT = 0 / number of group parameters
GCOUNT = 1 / number of groups
TFIELDS = 9 / number of table fields
TTYPE1 = 'V_POLARISATION'
TFORM1 = '1024E '
TUNIT1 = 'K '
TTYPE2 = 'Q_POLARISATION'
TFORM2 = '1024E '
TUNIT2 = 'K '
TTYPE3 = 'U_POLARISATION'
TFORM3 = '1024E '
TUNIT3 = 'K '
TTYPE4 = 'VV '
TFORM4 = '1024E '
TUNIT4 = 'sec '
TTYPE5 = 'VQ '
TFORM5 = '1024E '
TUNIT5 = 'sec '
TTYPE6 = 'VU '
TFORM6 = '1024E '
TUNIT6 = 'sec '
TTYPE7 = 'QQ '
TFORM7 = '1024E '
TUNIT7 = 'sec '
TTYPE8 = 'QU '
TFORM8 = '1024E '
TUNIT8 = 'sec '
TTYPE9 = 'UU '
TFORM9 = '1024E '
TUNIT9 = 'sec '
PIXTYPE = 'HEALPIX ' / HEALPIX pixelisation
ORDERING= 'RING ' / Pixel ordering scheme, either RING or NESTED
COORDSYS= 'C ' / Ecliptic, Galactic or Celestial (equatorial)
EXTNAME = 'xtension' / name of this binary table extension
NSIDE = 128 / Resolution parameter of HEALPIX
FIRSTPIX= 0 / First pixel # (0 based)
LASTPIX = 196607 / Last pixel # (0 based)
INDXSCHM= 'IMPLICIT' / Indexing: IMPLICIT or EXPLICIT
OBJECT = 'FULLSKY ' / Sky coverage, either FULLSKY or PARTIAL
TEMPTYPE= 'THERMO '
POLAR = 'T '
POLCCONV= 'COSMO '
TELESCOP= 'CLASS ' / Cosmology Large Angular Scale Surveyor
STOKES = 'VQU '
FREQ = '40 GHz '
RELEASE = 'DR1 ' / CLASS Data Release
DATE = '2023-08-30T23:20:19' / file creation date (YYYY-MM-DDThh:mm:ss UT)
END