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Further evidence of Quasiperiodic Eruptions in a tidal disruption event AT2019vcb by SRG/eROSITA
Sergei Bykov, Marat Gilfanov, Rashid Sunyaev +1
We report the discovery of a short, large amplitude X-ray flare from AT2019vcb (aka Tormund), a tidal disruption event at . The discovery is based on the data from the SRG…
X-ray Properties of the Luminous Quasar PG 1634+706 at z = 1.337 from SRG and XMM-Newton Data
Grigory Uskov, Sergey Sazonov, Marat Gilfanov +2
In the fall of 2019, during the in-flight calibration phase of the SRG observatory, the onboard eROSITA and Mikhail Pavlinsky ART-XC telescopes carried out a series of observations…
New Active Galactic Nuclei Detected by the ART-XC and eROSITA Telescopes during the First Five SRG All-Sky X-ray Surveys
Grigory Uskov, Sergey Sazonov, Igor Zaznobin +8
We present the results of our identification of 14 X-ray sources detected in the eastern Galactic sky ( ) in the 4-12 keV energy band on the combined map of the firs…
X-ray luminosity function of accreting neutron stars and black holes
K. A. Postnov, A. G. Kuranov, L. R. Yungelson +1
We model X-ray luminosity functions (XLF) of accreting neutron stars and black holes in erg/s range in star-forming galaxies and galaxies with the i…
Observations of Her X-1 in low states during SRG/eROSITA all-sky survey
N. I. Shakura, D. A. Kolesnikov, P. S. Medvedev +4
eROSITA (extended ROentgen Survey with an Imaging Telescope Array) instrument onboard the Russian-German `Spectrum-Roentgen-Gamma' (SRG) mission observed the Her X-1/HZ Her binary…
A dichotomy between the hard state spectral properties of black hole and neutron star X-ray~binaries
M. J. Burke, M. Gilfanov, R. Sunyaev
We analyse the spectra of black hole (BH) and neutron star (NS) X-ray binaries (XBs) in the hard state using archival RXTE observations. We find that there is a clear dichotomy in…