Fermi Gamma-ray Space Telescope

Kanata optical and X-ray monitoring of Gamma-ray emitting Narrow-Line Seyfert 1 and Radio galaxies

Kenji Kawaguchi
Yasushi Fukazawa, Yasuyuki Tanaka, Ryosuke Itoh, Makoto Uemura, Hiroshi Akitaya, Yuka Kanda, Kensei Shiki

Abstract:

Electromagnetic radiation from Active Galactic Nuclei(AGN) extends from radio up to TeV gamma-ray ranges. Broadband spectrum of AGN consists of multiple components such as jets and accretion disk.Temporal correlation study is useful to understand the emitting components and their physical condition. RL-NLSy1s have been attracted much attention as a new class of AGN from which Fermi-LAT detected MeV/GeV gamma-rays. This suggests that RL-NLSy1s have relativistic jets whose axis is inclined toward our line of sight, like Blazars. If RL-NLSy1s have similar characteristics to Blazars, synchrotron and inverse Compton radiation are dominant. Hence, we can expect high amplitude variability, correlations at optical/gamma-ray bands and high polarization degree at the optical band. We have performed optical monitoring using Kanata telescope for 6 RL-NLSy1s: 2 gamma-ray loud RL-NLSy1s, 1H 0323+342 and PMN J0948+0022, and 4 gamma-ray quiet RL-NLSy1s. We present our findings and discuss radiation process at the optical band. We have performed optical monitoring using Kanata telescope of gamma-ray emitting radio galaxies , 3C 120, 3C 111, 3C 390.3, NGC 1275. X-ray light curves were taken from archival MAXI and Swift-BAT data. Currently, we have not yet found any correlations between optical and X-ray bands.