Astrophysics> High Energy Astrophysical Phenomena
arXiv:2107.05879 (astro-ph)
[Submitted on 13 Jul 2021 (v1), last revised 30 Sep 2021 (this version, v2)]
Title:SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year
Authors:M. Pavlinsky, S. Sazonov, R. Burenin, E. Filippova, R. Krivonos, V. Arefiev, M. Buntov, C.-T. Chen, S. Ehlert, I. Lapshov, V. Levin, A. Lutovinov, A. Lyapin, I. Mereminskiy, S. Molkov, B.D. Ramsey, A. Semena, N. Semena, A. Shtykovsky, R. Sunyaev, A. Tkachenko, D.A. Swartz, A. Vikhlinin
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Abstract:We present a first catalog of sources detected by the Mikhail Pavlinsky ART-XC telescope on board the SRG observatory in the 4-12 keV energy band during its ongoing all-sky survey. The catalog comprises 867 sources detected on the combined map of the first two 6-month scans of the sky (December 2019 - December 2020). The achieved sensitivity to point sources varies between ~4x10^-12 erg/s/cm2 near the ecliptic plane and ~8x10^-13 erg/s/cm2 (4-12 keV) near the ecliptic poles, and the typical localization accuracy is ~15 arcsec. Of the 750 sources of known or suspected origin in the catalog, 56% are extragalactic (mostly active galactic nuclei, AGN; and clusters of galaxies) and the rest are Galactic (mostly cataclysmic variables, CVs; and low- and high-mass X-ray binaries). For 114 sources, ART-XC has detected X-rays for the first time. Although the majority of these (~80) are expected to be spurious (given the adopted detection threshold), there can be a significant number of newly discovered astrophysical objects. We have started a program of optical follow-up observations of the new and previously unidentified X-ray sources, which has already led to the identification of several AGN and CVs. With the SRG all-sky survey planned to continue for a total of four years, we can expect the ART-XC survey in the 4-12 keV band to significantly surpass previous surveys that were carried out in similar (medium X-ray) energy bands in terms of the combination of angular resolution, sensitivity, and sky coverage.
| Comments: | To appear on A&A, Special Issue: The Early Data Release of eROSITA and Mikhail Pavlinsky ART-XC on the SRG Mission; 40 pages, 10 figures, the catalog of sources is included |
| Subjects: | High Energy Astrophysical Phenomena (astro-ph.HE) |
| Cite as: | arXiv:2107.05879 [astro-ph.HE] |
| (or arXiv:2107.05879v2 [astro-ph.HE] for this version) | |
| https://doi.org/10.48550/arXiv.2107.05879
arXiv-issued DOI via DataCite
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| Journal reference: | A&A 661, A38 (2022) |
| Related DOI: | https://doi.org/10.1051/0004-6361/202141770
DOI(s) linking to related resources
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Submission history
From: Sergey Sazonov [view email][v1] 2021年7月13日 07:03:50 UTC (3,919 KB)
[v2] 2021年9月30日 12:52:23 UTC (2,079 KB)
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