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Abstract: After more than 5.5 years of in flight lifetime, the ESA space observatoryINTEGRAL is depicting a new scenario in the soft gamma Ray domain. With theobservation and discovery of more than 400 hard X-Ray sources has changed ourview of a moderately crowded and dark sky basically populated by -peculiar- anderratic sources. The new high energy sky is also composed by a large variety of-normal- though very powerful objects, characterized by new accretion andacceleration processes. Among the 421 sources detected in the energy range17-100 keV the 3rd INTEGRAL-IBIS catalogue includes 41% galactic accretingsystem, 29% extragalactic objects, 8% of other types, and 26% not classifiedi.e. of unknown origin. If compared to to previous IBIS-ISGRI surveys it isclear that there is a continuous increase of the rate of discovery of HMXB, anincrease in the number of AGN discovered, including a variety of distant QSOs,basically due to the increased exposure away from the Galaxy Plane, while thepercentage of sources without an identification has remained constant.INTEGRAL, by the end of Y6, will complete the Core Programme observation due toprovide an almost constant exposure of the whole Galaxy Plane and will be fullyopen to the scientific community for Open Time and Key Programme observationsfrom the beginning of 2009. In this paper we shortly review the main outcome ofthe 3rd INTEGRAL-IBIS catalogue cat3 including an excursus of the INTEGRALhigh energy sky with particular regard to sources emitting at high energy,including Low and High Mass X-Ray Binaries LMXB and HMXB, Supergiant Fast X-RayTransients SFXT, Pulsar Wind Nebulae PWN and Active Galactic Nuclei AGN.



Autor: Pietro Ubertini, for the IBIS Survey Team

Fuente: https://arxiv.org/



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