Zobrazeno 1 - 10
of 16
pro vyhledávání: '"D. I. Karasev"'
Autor:
Sergey S. Tsygankov, Juri Poutanen, D. I. Karasev, David A. H. Buckley, Alexander A. Lutovinov, Alexander Salganik, Anlaug A. Djupvik, Mariusz Gromadzki
This work is devoted to the study of the broadband 0.8-79 keV spectral and timing properties of the poorly studied X-ray pulsar XTE J1859+083 during its 2015 outburst based on the data from the NuSTAR and Swift observatories. We show that the source
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43dd8dbe1b6533fd090df9ba3bca0e98
http://arxiv.org/abs/2111.08997
http://arxiv.org/abs/2111.08997
Autor:
Sergey V. Molkov, D. I. Karasev, Armin Nabizadeh, Sergey S. Tsygankov, Long Ji, Juri Poutanen, Alexander A. Lutovinov
We present results of detailed investigation of the poorly studied X-ray pulsar 2S 1845$-$024 based on the data obtained with $NuSTAR$ observatory during the type I outburst in 2017. Neither pulse phase-averaged, nor phase-resolved spectra of the sou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94e153c7acfc32098fa4da9bd434b0d6
http://arxiv.org/abs/2110.06642
http://arxiv.org/abs/2110.06642
Autor:
Alexander A. Lutovinov, D. I. Karasev
Publikováno v:
Astronomy Letters. 44:220-235
The properties of red clump giants in the central regions of the Galactic bulge are investigated in the photometric $Z$ and $Y$ bands of the infrared VVV (VISTA/ESO) survey and the [3.6],[4.5], [5.8] and [8.0] bands of the GLIMPSE (Spitzer/IRAC) Gala
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::009178c77bff0e85c51519790a30e2cb
https://doi.org/10.1134/s1063773718040047
https://doi.org/10.1134/s1063773718040047
We report on analysis of properties of the X-ray binary pulsar GROJ1750-27 based on X-ray (Chandra, Swift, and Fermi/GBM), and near-infrared (VVV and UKIDSS surveys) observations. An accurate position of the source is determined for the first time an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9bbcab933e717a43a7716af4cb30b5a7
http://arxiv.org/abs/1902.05153
http://arxiv.org/abs/1902.05153
Autor:
Christian Malacaria, D. I. Karasev, Peter Kretschmar, Alexander A. Lutovinov, Anlaug A. Djupvik, Alexander A. Mushtukov, Juri Poutanen, Sergey S. Tsygankov, Sergey V. Molkov, Victor Doroshenko
Publikováno v:
The Astrophysical Journal, 909(2)
We present results of a detailed investigation of the poorly studied X-ray pulsar XTE J1858+034 based on the data obtained with the NuSTAR observatory during the outburst of the source in 2019. The spectral analysis resulted in the discovery of a cyc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43125631fb1e22742b8c2ea16456dd5a
https://doi.org/10.3847/1538-4357/abddbd
https://doi.org/10.3847/1538-4357/abddbd
Autor:
R. A. Burenin, D. I. Karasev, M. V. Eselevich, P. S. Medvedev, G. A. Khorunzhev, Roman Krivonos, M. N. Pavlinsky, A. Yu. Tkachenko, Alexander A. Lutovinov
We present the results of our optical identifications of several hard X-ray sources from the INTEGRAL all-sky survey obtained over 14 years of observations. Having improved the positions of these objects in the sky with the X-ray telescope (XRT) of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::119734b7f9557e8499bd62ac5e0ec826
Publikováno v:
Astronomy Letters. 41:394-406
This paper is devoted to determining the nature of the hard X-ray source IGR J17463-2854 located toward the Galactic bulge. Using data from the INTEGRAL and Chandra X-ray observatories, we show that five point X-ray sources with approximately identic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b0ec641e3d16ef76a1188ef140ccf91
https://doi.org/10.1134/s1063773715080022
https://doi.org/10.1134/s1063773715080022
Publikováno v:
Astronomy Letters. 39:523-531
Increasing the identification completeness of sources from new X-ray sky surveys is a necessary condition for further works on analyzing the formation and long-term evolution of star systems in our Galaxy. Infrared observations of several sources sel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::079dfcdac24d04c46d3e8f54ab78f67f
https://doi.org/10.1134/s1063773713080082
https://doi.org/10.1134/s1063773713080082
Publikováno v:
Astronomy Letters. 38:629-637
We present the results of Chandra and XMM-Newton observations for six hard X-ray sources (IGR J12134-6015, IGR J18293-1213, IGR J18219-1347, IGR J17350-2045, IGR J18048-1455, XTE J1901+014) from the INTEGRAL all-sky survey. Based on these observation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7d904976ff59bb6cb5cb4f5baab7381
https://doi.org/10.1134/s1063773712100039
https://doi.org/10.1134/s1063773712100039
Publikováno v:
Astronomy Letters. 36:788-795
We have investigated the stellar population of the Chandra Bulge Field (CBF) 35′ × 35′ in area using the Russian-Turkish RTT-150 telescope with the goal of constructing an interstellar extinction map and determining the extinction law. The optic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df8ff8a433093d3f45304815c018dbaf
https://doi.org/10.1134/s1063773710110046
https://doi.org/10.1134/s1063773710110046