Search Publications
Catalog of short gamma-ray transients detected in the SPI/INTEGRAL experiment
Minaev, P. Yu.; Pozanenko, A. S.; Grebenev, S. A. +1 more
We analyzed the data obtained by the SPI telescope onboard the INTEGRAL observatory to search for short transient events with a duration from 1 ms to a few tens of seconds. An algorithm for identifying gamma-ray events against the background of a large number of charged particle interactions with the detector has been developed. The classification…
Cutoff in the hard X-ray spectra of the ultraluminous X-ray sources HoIX X-1 and M82 X-1
Sazonov, S. Yu.; Lutovinov, A. A.; Krivonos, R. A.
Using data from the XMM-Newton and INTEGRAL observatories, we have detected a cutoff at energies above 10 keV in the X-ray spectra of the ultraluminous X-ray sources HoIX X-1 and M82 X-1. The spectra obtained can be described by amodel of Comptonization of radiation in a gas cloud of moderate temperature ( kT ∼ 2-3 keV) and high optical depth ( τ …
Measurements of the cosmic X-ray background of the Universe and the MVN experiment
Revnivtsev, M. G.
The paper is devoted to studying the cosmic X-ray background (CXB) of the Universe in the energy range 1-100 keV and to the prospects for its investigation by means of the projected MVN (Monitor Vsego Neba) experiment. The nature of the CXB and its use for studying the cosmological evolution of black holes are briefly discussed. The bulk of the pa…
Broadband spectrum of the total X-ray emission from the galaxy M31
Sunyaev, R. A.; Tsygankov, S. S.; Revnivtsev, M. G. +2 more
We present the results of measurements of the total X-ray flux from the Andromeda galaxy (M31) in the 3-100 keV band based on data from the RXTE/PCA, INTEGRAL/ISGRI, and SWIFT/BAT space experiments. We show that the total emission from the galaxy has a multicomponent spectrum whose main characteristics are specified by binaries emitting in the opt…