activity
19982025
most citedHard X-ray view of the past activity of Sgr A* in a natural Compton mirror

155 citations · 345 across the 15 of their papers we have counts for

collaborators

16 papers

astro-ph.HE2025

SRG/eROSITA-SDSS view on the relation between X-ray and UV emission for quasars

S. A. Prokhorenko, S. Yu. Sazonov, M. R. Gilfanov +5

Motivated by the idea of using quasars as standardizable candles for cosmology, we examine the relation between X-ray (at 2 keV, ) and ultraviolet (at 2500 Angstrom,…

astro-ph.HE2025★ 1 cited

New Active Galactic Nuclei Detected by the ART-XC and eROSITA Telescopes during the First Five SRG All-Sky X-ray Surveys. Part 2

Grigory Uskov, Sergey Sazonov, Igor Zaznobin +8

We present the results of our identification of 11 X-ray sources detected on the half of the sky in the 4-12 keV energy band on the combined map of the first…

astro-ph.GA2024★ 3 cited

Optical Identification and Spectroscopic Redshift Measurements of 216 Galaxy Clusters from the SRG/eROSITA All-Sky Survey

I. A. Zaznobin, R. A. Burenin, A. A. Belinski +34

We present the results of the optical identification and spectroscopic redshift measurements of 216 galaxy clusters detected in the SRG/eROSITA all-sky X-ray survey. The spectrosco…

astro-ph.GA2024★ 2 cited

Optical Identification of Galaxy Clusters among SRG/eROSITA X-ray Sources Based on Photometric Redshift Estimates for Galaxies

I. A. Zaznobin, R. A. Burenin, A. V. Meshcheryakov +5

We discuss an algorithm whereby the massive galaxy clusters detected in the SRG/eROSITA all-sky survey are identified and their photometric redshifts are estimated. For this purpos…

astro-ph.HE2024★ 5 cited

SRG/ART-XC Galactic Plane Survey near Galactic Longitude : Catalog of Sources

D. I. Karasev, A. N. Semena, I. A. Mereminskiy +11

We present a catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope onboard the SRG space observatory during the observations of the Galactic plane region near a lon…

astro-ph.HE2024

X-Ray Variability of SDSS Quasars Based on the SRG/eROSITA All-Sky Survey

S. A. Prokhorenko, S. Yu. Sazonov, M. R. Gilfanov +6

We examine the long-term (rest-frame time scales from a few months to years) X-ray variability of a sample of 2344 X-ray bright quasars from the SDSS DR14Q Catalogue, bas…