X-Ray and Optical Monitoring of a Gamma-Ray-Emitting Radio Galaxy, NGC 1275

被引：17

作者：

Yamazaki, Syoko ^{[1
]}

Fukazawa, Yasushi ^{[1
,3
]}

Sasada, Mahito ^{[1
,2
]}

Itoh, Ryosuke ^{[1
]}

Nishino, Sho ^{[1
]}

Takahashi, Hiromitsu ^{[1
]}

Takaki, Katsutoshi ^{[1
]}

Kawabata, Koji S. ^{[3
]}

Yoshida, Michitoshi ^{[3
]}

Uemura, Makoto ^{[3
]}

机构：

[1] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan

[2] Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan

[3] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2013年 / 65卷 / 02期

关键词：

instrumentation: detectors; methods: data analysis; X-rays: general; PERSEUS CLUSTER; SPECTRAL EVOLUTION; 3C; 84; POLARIZATION; VARIABILITY; EMISSION; NGC-1275; NUCLEUS; SUZAKU; TELESCOPE;

D O I：

10.1093/pasj/65.2.30

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We performed monitoring observations of a gamma-ray-emitting radio galaxy, NGC 1275, in the X-ray and optical bands with the Suzaku/XIS, Kanata telescope, and the Okayama telescope. The X-ray flux of the nucleus was estimated by imaging spectroscopy in the hard X-ray band. In the optical band, a continuum flux, a broad H alpha line flux, and the polarization degree were measured. We could not find any time variability of the X-ray (2006-2011) and optical continuum (2010-2011) within 30%, regardless of the recent radio and gamma-ray variability by a factor of 3. The observed optical polarization was very small at similar to 0.4% and showed little variability; it would be mostly of interstellar origin within our Galaxy. Furthermore, we confirmed with the XMM-Newton data that the X-ray spectrum of NGC 1275 in 2006 exhibited the Fe-K line, whose equivalent width was typical for other radio and Seyfert galaxies. These results indicate that the jet emission is not a major component in the optical and X-ray bands. Following these results, we discuss the jet emission of NGC 1275.

引用

页数：8

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