Speaker
Description
We describe a population of AGNs with extremely hard spectra found among the sources registered by SRG/eROSITA on the Eastern Galactic hemisphere. Such spectra cannot be explained by inverse Compton scattering typical of “normal” AGNs, but can be produced by the X-ray emission reflected from a dusty torus, indicating significant obscuration (up to the Compton-thick regime). We developed a method for selecting CT AGN candidates using SRG/eROSITA data from the Lockman Hole deep survey. Using the ~1 Ms XMM-Newton observations, we studied one of these candidates, SRGe J105149.5+573244, and showed that it has a relativistically broadened Fe K𝛂 line. We applied a similar selection procedure to the catalog of SRG/eROSITA sources registered on the Eastern Galactic hemisphere. The talk will cover preliminary results of this study.