Article

Astronomy Letters

, Volume 30, Issue 8, pp 527-533

A hard X-ray sky survey with the SIGMA telescope of the GRANAT observatory

  • M. G. RevnivtsevAffiliated withSpace Research Institute, Russian Academy of SciencesMax Planck Institut für Astrophysik
  • , R. A. SunyaevAffiliated withSpace Research Institute, Russian Academy of SciencesMax Planck Institut für Astrophysik
  • , M. R. GilfanovAffiliated withSpace Research Institute, Russian Academy of SciencesMax Planck Institut für Astrophysik
  • , E. M. ChurazovAffiliated withSpace Research Institute, Russian Academy of SciencesMax Planck Institut für Astrophysik
  • , A. GoldwurmAffiliated withDAPNIA/Service d’Astrophysique CEA SaclayFédération de Recherche Astroparticule et Cosmologie Université de Paris
  • , J. PaulAffiliated withDAPNIA/Service d’Astrophysique CEA SaclayFédération de Recherche Astroparticule et Cosmologie Université de Paris
  • , P. Mandrou
  • , J. P. RoquesAffiliated withCentre d’Etudes Spatiale des Rayonnements

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Abstract

The SIGMA X-ray telescope accumulated the images of more than a quarter of the sky during the in-orbit operation of the GRANAT observatory. The longest exposure time (∼9 million s) was spent on the observations of the Galactic center region. We give an overview of the SIGMA X-ray observations and report the sensitivities achieved in various regions of the sky.

Key words

GRANAT Observatory SIGMA X-ray telescope sky survey