XTENSION= 'BINTABLE'           /Written by IDL:  Fri Jan 11 10:09:09 2019
BITPIX  =                    8 /
NAXIS   =                    2 /Binary table
NAXIS1  =                 4096 /Number of bytes per row
NAXIS2  =                   48 /Number of rows
PCOUNT  =                    0 /Random parameter count
GCOUNT  =                    1 /Group count
TFIELDS =                    1 /Number of columns
TFORM1  = '1024E   '           /Real*4 (floating point)
TTYPE1  = 'UNKNOWN1'           /unknown content
PIXTYPE = 'HEALPIX '           / HEALPIX pixelisation
ORDERING= 'NESTED  '           / Pixel ordering scheme, either RING or NESTED
NSIDE   =                   64 / Healpix resolution parameter
NPIX    =                49152 / Total number of pixels
OBJECT  = 'FULLSKY '           / Sky coverage, either FULLSKY or PARTIAL
FIRSTPIX=                    0 / First pixel # (0 based)
LASTPIX =                49151 / Last pixel # (zero based)
INDXSCHM= 'IMPLICIT'           / indexing : IMPLICIT or EXPLICIT
GRAIN   =                    0 / GRAIN = 0: No index,
COMMENT         GRAIN =1: 1 pixel index for each pixel,
COMMENT         GRAIN >1: 1 pixel index for Grain consecutive pixels
COORDSYS= 'G       '           /
