Zobrazeno 1 - 10
of 205
pro vyhledávání: '"SAZONOV, Sergey"'
In this work we present results of a study of the Galactic hard X-ray and soft gamma-ray background emission performed with the IBIS telescope aboard INTEGRAL observatory using data obtained over more than 20 years of operations. The study of Galacti
Externí odkaz:
http://arxiv.org/abs/2409.20058
Autor:
Mukhin, Andrey, Krivonos, Roman, Bikmaev, Ilfan, Gorbachev, Mark, Khamitov, Irek, Sazonov, Sergey, Gilfanov, Marat, Sunyaev, Rashid
In this work, we studied X-ray source SRGe~J021932.4$-$040154 (SRGe J021932), which we associated with a single X-ray active star of spectral class G2V-G4V and the rotational period $\rm P_{rot} < 9.3$ days. Additional analysis of TESS light-curves a
Externí odkaz:
http://arxiv.org/abs/2408.07442
Publikováno v:
Astronomy Letters, 2023, Vol. 49, No. 11, pp. 621-638
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 of PG 1634+706 - one of the most luminous (an X-ray luminosity $\sim
Externí odkaz:
http://arxiv.org/abs/2403.17865
Publikováno v:
Astronomy Letters, 2022, Vol. 48, 12, pp. 735-754
We present the results of our search for highly variable active galactic nuclei (AGNs) the X-ray flux from which changed by more than an order of magnitude during the SRG/eROSITA all-sky survey. Using the eROSITA data obtained in the period from Dece
Externí odkaz:
http://arxiv.org/abs/2309.11266
Autor:
Uskov, Grigory, Sazonov, Sergey, Zaznobin, Igor, Burenin, Rodion, Gilfanov, Marat, Medvedev, Pavel, Sunyaev, Rashid, Krivonos, Roman, Filippova, Ekaterina, Khorunzhev, Georgii, Eselevich, Maksim
Publikováno v:
Astronomy Letters, 2023, Vol. 49, No. 2
We present the results of our identification of 14 X-ray sources detected in the eastern Galactic sky ($0
Externí odkaz:
http://arxiv.org/abs/2306.08646
Autor:
An, Tao, Wang, Ailing, Liu, Yuanqi, Sotnikova, Yulia, Zhang, Yingkang, Aditya, J. N. H. S., Jaiswal, Sumit, Khorunzhev, George, Lao, Baoqiang, Lin, Ruqiu, Mikhailov, Alexander, Mingaliev, Marat, Mufakharov, Timur, Sazonov, Sergey
Jets may have contributed to promoting the growth of seed black holes in the early Universe, and thus observations of radio-loud high-redshift quasars are crucial to understanding the growth and evolution of the early supermassive black holes. Here w
Externí odkaz:
http://arxiv.org/abs/2212.10113
Autor:
Uskov, Grigory, Zaznobin, Igor, Sazonov, Sergey, Semena, Andrey, Gilfanov, Marat, Burenin, Rodion, Eselevich, Maksim, Krivonos, Roman, Lyapin, Alexander, Medvedev, Pavel, Khorunzhev, Georgii, Sunyaev, Rashid
Publikováno v:
Astronomy Letters, 2022, Vol. 48, No. 2
We present the results of our identification of 17 X-ray sources detected in the 4-12 keV energy range by the Mikhail Pavlinsky ART-XC telescope during the first year of the SRG all-sky survey. Three of them have been discovered by the ART-XC telesco
Externí odkaz:
http://arxiv.org/abs/2208.10963
Autor:
Mukhin, Andrey, Krivonos, Roman, Bikmaev, Ilfan, Gorbachev, Mark, Khamitov, Irek, Sazonov, Sergey, Gilfanov, Marat, Sunyaev, Rashid
Publikováno v:
In Journal of High Energy Astrophysics March 2025 45:105-115
Publikováno v:
In Journal of High Energy Astrophysics March 2025 45:96-104
Autor:
Yao, Yuhan, Ho, Anna Y. Q., Medvedev, Pavel, J., Nayana A., Perley, Daniel A., Kulkarni, S. R., Chandra, Poonam, Sazonov, Sergey, Gilfanov, Marat, Khorunzhev, Georgii, Khatami, David K., Sunyaev, Rashid
We present AT2020mrf (SRGe J154754.2$+$443907), an extra-galactic ($z=0.1353$) fast blue optical transient (FBOT) with a rise time of $t_{g,\rm rise}=3.7$ days and a peak luminosity of $M_{g,\rm peak}=-20.0$. Its optical spectrum around peak shows a
Externí odkaz:
http://arxiv.org/abs/2112.00751