Search Publications
Search for AGNs in Dwarf Galaxies in the the M81 Field with INTEGRAL Data
Sazonov, S. Yu.; Karachentsev, I. D.; Mereminskiy, I. A. +1 more
Using long-term INTEGRAL hard X-ray observations, we have put upper limits on the bolometric luminosity ($L_{\textrm{bol}}\lesssim 10^{41}$ erg s${}^{-1}$) of the nuclei of 72 nearby dwarf galaxies located in the M81 field. This has allowed us to constrain the fraction of galaxies in which the central black hole accretes matter at a rate above 0.1…
SRG/ART-XC Galactic Plane Survey near Galactic Longitude L 20°: Catalog of Sources
Sazonov, S. Yu.; Lutovinov, A. A.; Karasev, D. I. +11 more
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 longitude l~20° (L20 field) in October 2019. The L20 field was observed four times in the scanning mode, which provided a uniform coverage of the sky region with a total ar…
Chromatic Afterglow of GRB 200829A
Minaev, P. Yu.; Pozanenko, A. S.; Volnova, A. A. +16 more
We present the results of our analysis of multiwavelength observations for the long gamma-ray burst GRB 200829A. The burst redshift $z≈ 1.29± 0.04$ has been determined photometrically at the afterglow phase. In gamma rays the event is one of the brightest (in isotropic equivalent), $E_{\textrm{iso}}\gtrsim 10^{54}$ erg. The multicolor light curve …