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Masses and accretion rates of supermassive black holes in active galactic nuclei from the INTEGRAL survey
Sazonov, S. Yu.; Khorunzhev, G. A.; Burenin, R. A. +1 more
The masses of 68 supermassive black holes (SMBHs) in nearby ( z < 0.15) active galactic nuclei (AGNs) detected by the INTEGRAL observatory in the hard X-ray energy band (17-60 keV) outside the Galactic plane (| b| 5°) have been estimated. Well-known relations between the SMBHmass and (1) the infrared luminosity of the stellar bulge (from 2MASS …
Accurate localization and identification of six hard X-ray sources from Chandra and XMM-Newton data
Lutovinov, A. A.; Revnivtsev, M. G.; Karasev, D. I. +1 more
We present the results of Chandra and XMM-Newton observations for six hard X-ray sources (IGR J12134-6015, IGR J18293-1213, IGR J18219-1347, IGR J17350-2045, IGR J18048-1455, XTE J1901+014) from the INTEGRAL all-sky survey. Based on these observations, we have improved significantly the localization accuracy of the objects and, therefore, have man…
Optical identification of six hard X-ray sources from the INTEGRAL and SWIFT all-sky surveys
Bikmaev, I. F.; Lutovinov, A. A.; Revnivtsev, M. G. +1 more
We present results of optical identifications of six hard X-ray sources from the INTEGRAL and Swift all-sky surveys (IGR J03249+4041, SWIFT J1449.5+8602, SWIFT J1542.0-1410, IGR J17009+3559, IGR J18151-1052, IGR J18538-0102). Our optical observations were performed in 2009-2011 with the 6-m BTA telescope (Special Astrophysical Observatory, Nizhnii…
GRB 070912—A gamma-ray burst recorded from the direction to the galactic center
Frederiks, D. D.; Minaev, P. Yu.; Pozanenko, A. S. +3 more
The detection of GRB 070912 recorded in the field of view of the SPI, IBIS/ISGRI, and JEMX telescope on September 12, 2007, at 07h32m19s (UT) when analyzing the INTEGRAL archival data is reported. The burst is one of the well-localized events closest to the direction toward the Galactic center (less than [InlineMed…
Luminosity function of high-mass X-ray binaries and anisotropy in the distribution of active galactic nuclei toward the Large Magellanic Cloud
Tsygankov, S. S.; Lutovinov, A. A.; Grebenev, S. A.
In 2003-2012, the INTEGRAL observatory has performed long-term observations of the Large Magellanic Cloud (LMC). At present, this is one of the deepest hard X-ray (20-60 keV) surveys of extragalactic fields in which more than 20 sources of different natures have been detected. We present the results of a statistical analysis of the population of h…
New fast X-ray transient IGR J18462-0223 discovered by the INTEGRAL observatory.
Sunyaev, R. A.; Grebenev, S. A.
On the possibility of investigating the galactic center region with the integral observatory by the method of lunar and terrestrial occultations
Sunyaev, R. A.; Grebenev, S. A.; Eismont, N. A. +1 more
The possibility of investigating the sky region near the Galactic center with instruments of the INTEGRAL orbital astrophysical gamma-ray observatory by the method of its occultation by the Earth and the Moon is considered. Existing engineering constraints on the observing conditions, such as the admissible orientation of the INTEGRAL satellite re…