Minute-scale rapid variability of the optical polarization in the narrow-line seyfert 1 galaxy pmn j0948+0022
Ryosuke Itoh,Yasuyuki T. Tanaka,Yasushi Fukazawa,Koji S. Kawabata,K. Kawaguchi,Yuki Moritani,Katsutoshi Takaki,Issei Ueno,Makoto Uemura,Hiroshi Akitaya,Michitoshi Yoshida,Takashi Ohsugi,Hidekazu Hanayama,Takeshi Miyaji,Nobuyuki Kawai +14 more
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In this article, optical photopolarimetric results of the radio-loud narrow-line Seyfert 1 (RL-NLSy1) galaxy PMN J0948+0022 on 2012 December to 2013 February triggered by flux enhancements in the near infrared and?-ray bands were reported.Abstract:
We report on optical photopolarimetric results of the radio-loud narrow-line Seyfert 1 (RL-NLSy1) galaxy PMN J0948+0022 on 2012 December to 2013 February triggered by flux enhancements in the near infrared and ?-ray bands. With the one-shot polarimetry of the Hiroshima One-shot Wide field Polarimeter installed on the Kanata Telescope, we detected very rapid variability in the polarized-flux (PF) light curve on MJD 56281 (2012 December 20). The rise and decay times were about 140?s and 180?s, respectively. The polarization degree (PD) reached 36% ? 3% at the peak of the short-duration pulse, while the polarization angle remained almost constant. In addition, temporal profiles of the total flux and PD showed highly variable but well correlated behavior and discrete correlation function analysis revealed that no significant time lag of more than 10?minutes was present. The high PD and minute-scale variability in PF provides clear evidence of synchrotron radiation from a very compact emission region of ~1014 cm size with a highly ordered magnetic field. Such micro-variability of polarization is also observed in several blazar jets, but its complex relation between total flux and PD are explained by a multi-zone model in several blazars. The implied single emission region in PMN J0948+0022 might reflect a difference of jets between RL-NLSy1s and blazars.read more
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Journal ArticleDOI
Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies
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Journal ArticleDOI
The host-galaxy of the gamma-ray Narrow-line Seyfert 1 galaxy 1H~0323+342
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TL;DR: In this paper, optical and near infrared (NIR) imaging data of the radio-loud Narrow-line Seyfert 1 galaxy 1H 0323+342 was used to investigate the structural properties of the host galaxy.
Journal ArticleDOI
The host galaxy of the gamma-ray narrow-line seyfert 1 galaxy 1h 0323+342
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TL;DR: In this article, optical and near-infrared (NIR) imaging data of the radio-loud, narrow-line Seyfert 1 galaxy 1H 0323+342, which shows intense and variable gamma-ray activity discovered by the Fermi satellite with the Large Area Telescope.
Journal ArticleDOI
Radio jet emission from GeV-emitting narrow-line Seyfert 1 galaxies
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Journal ArticleDOI
The Peculiar Radio-loud Narrow Line Seyfert 1 Galaxy 1H 0323+342
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TL;DR: In this article, a multi-wavelength study of the radio-loud narrow-line Seyfert 1 galaxy (NLSy1) 1H 0323+342, detected by the Fermi Gamma-Ray Space Telescope, is presented.
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