Search Publications
Determination of parameters of Long-Term variability of the X-ray pulsar LMC X-4
Lutovinov, A. A.; Falanga, M.; Molkov, S. V.
We have investigated the temporal variability of the X-ray flux measured from the high-mass X-ray binary LMCX-4 on time scales from several tens of days to tens of years, i.e., exceeding considerably the orbital period (~1.408 days). In particular, we have investigated the 30-day cycle of modulation of the X-ray emission from the source (superorbi…
IGR J17463-2854, a possible symbiotic binary system in the galactic center region
Tsygankov, S. S.; Lutovinov, A. A.; Karasev, D. I.
This paper is devoted to determining the nature of the hard X-ray source IGR J17463-2854 located toward the Galactic bulge. Using data from the INTEGRAL and Chandra X-ray observatories, we show that five point X-ray sources with approximately identical fluxes in the 2-10 keV energy band are detected in the error circle of the object under study. I…
JEM-X/INTEGRAL X-ray survey of the galactic center region
Grebenev, S. A.; Mereminskiy, I. A.
An X-ray survey of the Galactic center region with a radius of ~20° has been performed using the data obtained with the JEM-X telescope onboard the INTEGRAL observatory over ~10 years of observations (2003-2013). The exposure at the field center directly toward the Galactic center has reached 4.8 Ms. We have constructed sky maps in the 5-10 and 10…
Determining the nature of faint X-ray sources from the ASCA Galactic center survey
Bikmaev, I. F.; Tsygankov, S. S.; Lutovinov, A. A. +6 more
We present the results of the the identification of six objects from the ASCA Galactic center and Galactic plane surveys: AX J173548-3207, AX J173628-3141, AX J1739.5-2910, AX J1740.4-2856, AX J1740.5-2937, and AX J1743.9-2846. Chandra, XMM-Newton, and XRT/Swift X-ray data have been used to improve the positions of the optical counterparts to thes…
QPO and LFN in the power spectrum of rapid variability for the X-ray nova SWIFT J174510.8-262411
Grebenev, S. A.; Prosvetov, A. V.
Results of the study of the X-ray nova SWIFT J174510.8-262411 by the INTEGRAL, SWIFT, and VLA observatories in September-October 2012 at the early outburst phase are presented. Attention is focused on analyzing the power spectrum of X-ray flux fluctuations of the source in which a powerful quasi-periodic oscillation (QPO) peak has been detected. T…