Zobrazeno 1 - 10
of 207
pro vyhledávání: '"Gilfanov, M R"'
Autor:
Kolbin, A. I., Karpova, A. V., Suslikov, M. V., Bikmaev, I. F., Gilfanov, M. R., Khamitov, I. M., Shibanov, Yu. A., Zyuzin, D. A., Beskin, G. M., Plokhotnichenko, V. L., Gutaev, A. G., Karpov, S. V., Lyapsina, N. V., Medvedev, P. S., Sunyaev, R. A., Kirichenko, A. Yu., Gorbachev, M. A., Irtuganov, E. N., Gumerov, R. I., Sakhibullin, N. A., Shablovinskaya, E. S., Malygin, E. A.
SRGe J194401.8+284452 is the brightest point-like X-ray object within the position uncertainty ellipse of an unidentified $\gamma$-ray source 4FGL J1943.9+2841. We performed multi-wavelength spectral and photometric studies to determine its nature an
Externí odkaz:
http://arxiv.org/abs/2408.14136
Autor:
Zaznobin, I. A., Burenin, R. A., Belinski, A. A., Bikmaev, I. F., Gilfanov, M. R., Dodin, A. V., Dodonov, S. N., Eselevich, M. V., Zheltoukhov, S. F., Irtuganov, E. N., Kotov, S. S., Krivonos, R. A., Lyskova, N. S., Malygin, E. A., Maslennikova, N. A., Medvedev, P. S., Meshcheryakov, A. V., Moiseev, A. V., Oparin, D. V., Potanin, S. A., Postnov, K. A., Sazonov, S. Yu., Safonov, B. S., Sakhibullin, N. A., Starobinsky, A. A., Suslikov, M. V., Sunyaev, R. A., Tatarnikov, A. M., Uskov, G. S., Uklein, R. I., Khabibullin, I. I., Khamitov, I. M., Khorunzhev, G. A., Churazov, E. M., Shablovinskaya, E. S., Shatsky, N. I.
Publikováno v:
Astronomy Letters 49 (2023) 599-620
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 spectroscopic observations were performed in 2020-2023 with the 6-m BTA telescop
Externí odkaz:
http://arxiv.org/abs/2403.18625
Autor:
Zaznobin, I. A., Burenin, R. A., Meshcheryakov, A. V., Gilfanov, M. R., Lyskova, N. S., Medvedev, P. S., Sazonov, S. Yu., Sunyaev, R. A.
Publikováno v:
Astronomy Letters 49 (2023) 431-444
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 purpose, we use photometric redshift estimates for galaxies and WISE forced
Externí odkaz:
http://arxiv.org/abs/2403.18608
Autor:
Prokhorenko, S. A., Sazonov, S. Yu., Gilfanov, M. R., Balashev, S. A., Bikmaev, I. F., Ivanchik, A. V., Medvedev, P. S., Starobinsky, A. A., Sunyaev, R. A
We examine the long-term (rest-frame time scales from a few months to $\sim 20$ years) X-ray variability of a sample of 2344 X-ray bright quasars from the SDSS DR14Q Catalogue, based on the data of the SRG/eROSITA All-Sky Survey complemented for $\si
Externí odkaz:
http://arxiv.org/abs/2401.12860
Autor:
Zyuzin, D. A., Kirichenko, A. Yu., Karpova, A. V., Shibanov, Yu. A., Zharikov, S. V., Gilfanov, M. R., Tórtola, C. Perez
An unidentified $\gamma$-ray source 4FGL J1838.2+3223 has been proposed as a pulsar candidate. We present optical time-series multi-band photometry of its likely optical companion obtained with the 2.1-m telescope of Observatorio Astron\'omico Nacion
Externí odkaz:
http://arxiv.org/abs/2311.09108
Autor:
Kirichenko, A. Yu., Zharikov, S. V., Karpova, A. V., Fonseca, E., Zyuzin, D. A., Shibanov, Yu. A., López, E. A., Gilfanov, M. R., Cabrera-Lavers, A., Geier, S., Dong, F. A., Good, D. C., McKee, J. W., Meyers, B. W., Stairs, I. H., McLaughlin, M. A., Swiggum, J. K.
PSR J1641+8049 is a 2 ms black widow pulsar with the 2.2 h orbital period detected in the radio and $\gamma$-rays. We performed new phase-resolved multi-band photometry of PSR J1641+8049 using the OSIRIS instrument at the Gran Telescopio Canarias. Th
Externí odkaz:
http://arxiv.org/abs/2311.08688
We present a sample of 99 dwarf galaxies ($M_*<10^{9.5} M_\odot$) with X-ray activity in their central regions. The sample was obtained from a match of the SRG/eROSITA X-ray catalogue in the Eastern Galactic hemisphere with the MPA-JHU SDSS catalogue
Externí odkaz:
http://arxiv.org/abs/2310.00303
Autor:
Khamitov, I. M., Bikmaev, I. F., Gilfanov, M. R., Sunyaev, R. A., Medvedev, P. S., Gorbachev, M. A.
Publikováno v:
Pisma v Astronomicheskiy Zhurnal, 2023, Vol 49, 6, pp. 369-398
We present a sample of SRG/eROSITA X-ray sources located in the eastern Galactic hemisphere (0
Externí odkaz:
http://arxiv.org/abs/2309.11308
We have classified the point-like X-ray sources detected by the SRG/eROSITA telescope in the deep Lockman Hole survey. The goal was to separate the sources into Galactic and extragalactic objects. In this work have used the results of our previous cr
Externí odkaz:
http://arxiv.org/abs/2307.14737
The Fermi catalogue contains about 2000 unassociated $\gamma$-ray sources. Some of them were recently identified as pulsars, including so called redbacks and black widows, which are millisecond pulsars in tight binary systems with non- and partially-
Externí odkaz:
http://arxiv.org/abs/2306.17593