Search Publications
Polarized Light from Accreting Low Mass X-Ray Binaries
Capitanio, F.; Farinelli, R.; Fabiani, S. +5 more
Thanks to IXPE, the X-ray spectro-polarimeter launched at the end of 2021, X-ray polarimetry has finally become an extraordinary tool in investigating the physics of accretion in low mass X-ray binaries. Similarly to what happened with gravitational waves, X-ray polarimetry would play a new complementary but at the same time fundamental role in th…
Narrow-Line SY1 NGC 4748 in X-Rays: Detailed Case-Study
Vasylenko, A.; Fedorova, E.; Del Popolo, A.
We analyze all the available X-ray data in order to monitor the narrow-line Seyfert 1 galaxy NGC 4748, namely XMM-Newton (EPIC and OM), INTEGRAL (ISGRI and JEM-X), and SWIFT (BAT and XRT) data to study both the wide-band 0.5-195 keV spectrum and light curves in details. To this aim, we use the autocorrelation analysis of the light curves, modeling…
Possible Electromagnetic Manifestations of Merging Black Holes
Bisikalo, D. V.; Zhilkin, A. G.; Kurbatov, E. P.
The scenario of a merger of two black holes surrounded by an accretion disk is considered. As a result of the emission of gravitational waves, the mass of the central object decreases, and the accretion disk is perturbed. Computational results show that the main consequence of this perturbation is the formation of a shock propagating from the cent…
V404 CYG/GS 2023+338: Monitoring in the Optical with Robotic Telescopes of the MASTER Global Network during the 2015 Superburst
Rebolo, R.; Buckley, D. A. H.; Giovannelli, F. +23 more
2070 unique, homogeneous photometric and polarization observations of the microquasar in a binary system with a black hole V404 Cyg/GS2023+338 obtained in 2015 with the MASTER global network of robotic telescopes (16 robotic telescopes located at eight points on the Earth in Russia, Spain, South Africa, and Argentina) are presented. MASTER was the…
A study of the X-ray pulsars X1845-024 and XTE J1858+034 based on INTEGRAL observations
Doroshenko, V. A.; Doroshenko, R. F.; Postnov, K. A. +2 more
We present an analysis of observations of the relatively unstudied X-ray pulsars X1845-024 and XTE J1858+034 carried out from May 2003 through November 2004 using the JEM-X and IBIS telescopes of the INTEGRAL international gamma-ray observatory at energies of 5-70 keV. The X-ray spectra and light curves of the pulsars are constructed. During the o…