| Name: | Arijit Sar |
| Affiliation: | Presidency University |
| Conference ID : | ASI2024_25 |
| Title : | Exploring the UV/X-ray spectral variability of MCG-6-30-15 using AstroSat |
| Authors : | Arijit Sar1, Ritaban Chatterjee1 |
| Authors Affiliation: | 1 School of Astrophysics, Presidency University, Kolkata 700073, India |
| Mode of Presentation: | Oral |
| Abstract Category : | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract : | The archetypal Seyfert I galaxy MCG-6-30-15 has been widely studied by astronomers for decades due to it being a nearby X-ray bright source with significant variability in its X-ray emission and the presence of an asymmetric broad iron line in its X-ray spectrum, which points toward the presence of a standard accretion disk around the central black hole in this source. AstroSat has performed several multi-epoch longlook observations of this Seyfert galaxy in the past few years. We performed spectral and timing analysis of all archival AstroSat data of MCG-6-30-15 to explore the origin of the variability in various spectral components of the broadband UV/X-ray SED and how that relates to the geometry of the inner accretion disk and the corona. We have developed a model of the emission from the accretion disk and corona of Seyfert galaxies to simulate light curves and compare them with analyzed data. We found that the soft X-ray component lags the primary hard X-ray continuum by a few kiloseconds. This is consistent with soft X-rays being produced by the reprocessing of hard X-rays by the accretion disk in this source. |
