THE PECULIAR RADIO-LOUD NARROW LINE SEYFERT 1 GALAXY 1H 0323+342

Abstract

We present a multi-wavelength study of the radio-loud narrow line Seyfert 1\ngalaxy (NLSy1), 1H 0323+342, detected by Fermi Gamma Ray Space Telescope.\nMulti-band light curves show many orphan X-ray and optical flares having no\ncorresponding {\\gamma}-ray counterparts. Such anomalous variability behavior\ncan be due to different locations of the emission region from the central\nsource. During a large flare, {\\gamma}-ray flux doubling time scale as small as\n$\\sim$ 3 hours is noticed. We built spectral energy distribution (SED) during\ndifferent activity states and modeled them using an one-zone leptonic model.\nThe shape of the optical/UV component of the SEDs is dominated by accretion\ndisk emission in all the activity states. In the X-ray band, significant\nthermal emission from the hot corona is inferred during quiescent and first\nflaring states, however, during subsequent flares, non-thermal jet component\ndominates. The {\\gamma}-ray emission in all the states can be well explained by\ninverse-Compton scattering of accretion disk photons reprocessed by the broad\nline region. The source showed violent intra-night optical variability,\ncoinciding with one of the high {\\gamma}-ray activity states. An analysis of\nthe overall X-ray spectrum fitted with an absorbed power-law plus relativistic\nreflection component hints for the presence of Fe K-{\\alpha} line and returns a\nhigh black hole spin value of a=0.96 $\\pm$ 0.14. We argue that 1H 0323+342\npossesses dual characteristics, akin to flat spectrum radio quasars (FSRQs) as\nwell as radio-quiet NLSy1s, though at a low jet power regime compared to\npowerful FSRQs.\n