Abstract Details
| Name: Pramod Pawar Affiliation: SRTM University Nanded, (MH) India Conference ID: ASI2015_451 Title : X-ray and Optical/UV variability of NLS1 1H0707-495 Authors and Co-Authors : Gulab Dewangan{2}, Ranjeev Misra{2}, Madhav Patil{1} {1} School of Physical Sciences, Swami Ramanand Teerth Marathwada University, Nanded-431606; {2} Inter University Center for Astronomy and Astrophysics, Pune-411007 Abstract Type : Poster Abstract Category : Extragalactic astronomy Abstract : Though accretion disk of AGN emit in optical/UV bands, primary emission occurs in the X-ray band and is believed to originate from the hot corona. In addition to this primary X-ray emission several other features e.g., the fluorescent Fe $K_{alpha}$ line, reflection hump and soft excess emission are also observed which are attributed to the reprocesses taking place at different regions of the disk. The Fe $K_{alpha}$ line and Compton hump are generally attributed to the reprocessing of primary X-ray power law by the disk, whereas, the soft excess is attributed to either thermal Comptonization of disk photons in an optically thick, cool plasma or to the blurred ionized reflection from the disk. Therefore, it is customary to investigate different mechanisms that are responsible for these emissions and also to investigate a possible connection between them, which cannot be addressed merely using spectroscopic techniques. However, as any reprocessing introduces an inter-band lag, correlated multi-wavelength variability has been identified as a key tool to investigate the physics of reprocessing. In this paper we present results derived from the analysis of simultaneous X-ray and optical/UV observations of narrow line Seyfert 1 galaxy 1H0707-495 using the XMM-Newton and SWIFT satellites. This study involves different statistical tools to investigate the inter-band correlation. |