Issue |
A&A
Volume 661, May 2022
The Early Data Release of eROSITA and Mikhail Pavlinsky ART-XC on the SRG mission
|
|
---|---|---|
Article Number | A38 | |
Number of page(s) | 18 | |
Section | Catalogs and data | |
DOI | https://doi.org/10.1051/0004-6361/202141770 | |
Published online | 18 May 2022 |
SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year★
1
Space Research Institute,
84/32 Profsouznaya str.,
Moscow
117997,
Russian Federation
e-mail: sazonov@iki.rssi.ru
2
Universities Space Research Association,
Huntsville,
AL
35805,
USA
3
NASA/Marshall Space Flight Center,
Huntsville,
AL
35812,
USA
4
Harvard-Smithsonian Center for Astrophysics,
60 Garden Street,
Cambridge,
MA
02138,
USA
Received:
12
July
2021
Accepted:
17
September
2021
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), ART-XC sky surveys 1 and 2, or ARTSS12. The achieved sensitivity to point sources varies between ~4 x 10-12 erg s-1 cm-2 near the ecliptic plane and ~8 x 10-13 erg s-1 cm-2 (4–12keV) near the ecliptic poles, and the typical localization accuracy is ~15”. 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.
Key words: surveys / catalogs / X-rays: general
Table B.1 is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/cat/J/A+A/661/A38
© ESO 2022
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