SRG/ART-XC 1st year all-sky X-ray survey

The catalog comprises 867 sources detected on the combined map of the first two 6-month scans of the sky (Dec. 2019 - Dec. 2020) - ART-XC sky surveys 1 and 2. The achieved sensitivity to point sources varies between ~4*10^-12^erg/s/cm^2^ near the ecliptic plane and ~8*10^13^erg/s/cm^2^ (4-12keV) near the ecliptic poles, and the typical localization accuracy is ~15-arcsec.

Among 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.