X-Ray Spectral Properties of Seyfert I Galaxy LEDA 168563

• Published in: The Astrophysical journal Vol. 868; no. 1; pp. 11 - 24
• Main Authors: Liebmann, Andrew C., Fabian, Andrew C., Tsuruta, Sachiko, Haba, Yoshito, Kunieda, Hideyo
• Format: Journal Article
• Language: English
• Published: Philadelphia The American Astronomical Society 20.11.2018; IOP Publishing
• Subjects: Active galactic nuclei; Astrophysics; Broadband; Emission; Galaxies; galaxies: active; galaxies: individual (LEDA 168563); galaxies: Seyfert; High energy astronomy; K alpha line; Leda; Power law; Seyfert galaxies; Stars & galaxies; X ray spectra; X-ray emissions; X-rays: galaxies; XMM (spacecraft)
• ISSN: 0004-637X; 1538-4357
• DOI: 10.3847/1538-4357/aae309

Interesting among possible mechanisms responsible for X-ray emission from active galactic nuclei (AGNs) is ionized relativistic reflection (IRR). Since it arises close to the central black hole it can test strong gravity. Its characteristic features include a high energy Compton hump, a broad Fe K line, and a soft excess. Therefore, using the Swift-Burst Alert Telescope (BAT) catalog we looked for hard X-ray selected AGNs that may exhibit at least one of these characteristic features. Among the possibly interesting targets found is Seyfert I Galaxy LEDA 168563. We obtained a broadband 100 ks Suzaku observation of this source, and careful analysis of the data was carried out. The results support the presence of these IRR distinct features. Moreover, the comparison of the earlier combined XMM-Newton and Swift-BAT and more recent Suzaku data showed interesting long-term spectral variability. The soft excess decreased while higher energy features relatively increased and the power-law component became flatter-the behavior predicted by the IRR model.