--- header unit 0: primary ---
SIMPLE = T / file does conform to FITS standard
BITPIX = -32 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 449 / length of data axis 1
NAXIS2 = 449 / length of data axis 2
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
COMMENT Paper: INTEGRAL/IBIS 17-yr hard X-ray all-sky survey
COMMENT Authors: Krivonos R., Sazonov S., Kuznetsova E.,
COMMENT Authors: Lutovinov A., Mereminskiy I., Tsygankov S.
COMMENT Bibcode: 2022MNRAS.510.4796K
COMMENT This is raw sky mosaic (not convolved with PSF)
EXPOSURE = 4.5164152000E+07 / exposure sec, d.t.corrected
TELAPSE = 0.0000000000E+00 / elapsed time, sec
E1 = 1.7000000000E+01 / lower energy
E2 = 6.0000000000E+01 / upper energy
TJD-OBS = 6.4269278467E+06 / TJD of observation start
TJD-END = 5.4353567940E+08 / TJD of observation end
UNITS = 'DLD map' / units of the image
NN = 3 / detector sampling factor
CRPIX1 = 2.2450000000E+02 / WCS information
CRPIX2 = 2.2450000000E+02 / WCS information
CRVAL1 = 2.2500000000E+01 / WCS information
CRVAL2 = 6.6443700000E+01 / WCS information
CDELT1 = -6.6779133333E-02 / WCS information
CDELT2 = 6.6779133333E-02 / WCS information
CTYPE1 = 'RA---TAN' / WCS information
CTYPE2 = 'DEC--TAN' / WCS information
CROTA2 = 0.0000000000E+00 / WCS information
RADECSYS = 'FK5' / WCS information
EQUINOX = 2.0000000000E+03 / WCS information
HISTORY Created by INTEGRAL data reduction s/w; E.Churazov, M.Gilfanov
HISTORY Author: Roman Krivonos, krivonos@cosmos.ru
HISTORY Uploaded to CDS in Feb 2024
HISTORY https://integral.cosmos.ru
HISTORY The flux DLD map is in mCrab units
HISTORY 1 mCrab =1.43e-11 erg/s/cm^2
DATE = '2020-11-12T11:16:16' / file creation date (YYYY-MM-DDThh:mm:ss UT)
EXTNAME = 'skydld'
--- header unit 1: image ---
XTENSION = 'IMAGE' / IMAGE extension
BITPIX = -32 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 449 / length of data axis 1
NAXIS2 = 449 / length of data axis 2
PCOUNT = 0 / required keyword; must = 0
GCOUNT = 1 / required keyword; must = 1
EXTNAME = 'skyerr'
--- header unit 2: image ---
XTENSION = 'IMAGE' / IMAGE extension
BITPIX = -32 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 449 / length of data axis 1
NAXIS2 = 449 / length of data axis 2
PCOUNT = 0 / required keyword; must = 0
GCOUNT = 1 / required keyword; must = 1
EXTNAME = 'skyexp'