INTEGRAL 11-year hard X-ray survey above 100 keV

Abstract

We present results of all sky survey, performed with data acquired by the IBIS telescope onboard the INTEGRAL observatory over eleven years of operation, at energies above 100 keV. A catalogue of detected sources includes 132 objects. The statistical sample detected on the time-averaged 100-150 keV map at a significance above 5 sigma contains 88 sources: 28 AGNs, 38 LMXBs, 10 HMXBs and 12 rotation-powered young X-ray pulsars. The catalogue includes also 15 persistent sources, which were registered with the significance 4 sigma < S/N < 5 in hard X-rays, but at the same time were firmly detected (>12 sigma) in the 17-60 keV energy band. All sources from these two groups are known X-ray emitters, that means that the catalogue has 100% purity in respect to them. Additionally, 29 sources were found in different time intervals. In the context of the survey we present a hardness ratio of galactic and extragalactic sources, a LMXBs longitudinal asymmetry and a number-flux relation for non-blazar AGNs. At higher energies, in the 150-300 keV energy band, 25 sources have been detected with a signal-to-noise ratio S/N > 5 sigma, including 7 AGNs, 13 LMXBs, 3 HMXBs, and 2 rotation-powered pulsars. Among LMXBs and HMXBs we identified 12 black hole candidates (BHC) and 4 neutron star (NS) binaries.

9 pages, 7 figures, 3 tables, submitted to MNRAS, full version of Table 2 is available at http://hea.iki.rssi.ru/integral/table2.pdf

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Cited by in corpus (7)

• INTEGRAL/IBIS 17-yr hard X-ray all-sky survey
• The Galactic LMXB Population and the Galactic Centre Region
• 15 years of Galactic surveys and hard X-ray Background measurements
• Automated classification of Chandra X-ray point sources using machine learning methods
• The Disk Wind Contribution to the Gamma-Ray emission from the nearby Seyfert Galaxy GRS 1734-292
• Swift-XRT follow-up analysis of unidentified hard X-ray sources
• Recurrent Instability in LMXB Accretion Disks: How Strange is GRS 1915+105?