Multi-epoch X-ray observations of the narrow-line Seyfert 1 galaxy SDSS J160508.87+323921.4 with XMM-Newton

被引：0

作者：

YanLi Ai

WeiMin Yuan

HongYan Zhou

JianGuo Wang

机构：

[1] Chinese Academy of Sciences,National Astronomical Observatories/Yunnan Observatory

[2] Chinese Academy of Sciences,Key Laboratory for the Structure and Evolution of Celestial Objects

[3] Graduate University of the Chinese Academy of Sciences,Center for Astrophysics

[4] University of Science and Technology of China,Joint Institute of Galaxies and Cosmology

[5] SHAO and USTC,undefined

来源：

Science China Physics, Mechanics and Astronomy | 2010年 / 53卷

关键词：

galaxies: active; Seyfert; X-rays; individual;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We present results of multi-epoch XMM-Newton observations separated by several years of the narrow-line Seyfert 1 (NLS1) galaxy, SDSS J160508.87+323921.4. The NLS1 showed X-ray flux variations on timescales of years as well as low amplitude variations on timescales as short as hours, while the X-ray spectral shape remained essentially unchanged. The spectrum shows a significant soft X-ray excess. The model of reflection from an ionized disc, that is dominant in the whole XMM-Newton bandpass, provides the best description of the observed spectra for all the observations, though alternatives such as Compton scattering (T ∼ 0.25 keV) cannot be ruled out in a statistical sense. For the disc reflection model, the observed variations may originate either from the change in the reflection fraction, or from the variability of the intrinsic X-ray luminosity.

引用

页码：207 / 211

页数：4

共 25 条

[1]

Zhou H. Y.(2006)A comprehensive study of 2000 narrow line Seyfert 1 Galaxies from the sloan digital sky survey. I. The sample Astrophys J Suppl 166 128-153

[2]

Wang T. G.(2077)A new sample of low-mass black holes in active galaxies Astrophys J 670 92-104

[3]

Yuan W.(2004)A complete sample of soft X-Ray-selected AGNs. II. Statistical analysis Astron J 127 1799-1810

[4]

Greene J. E.(2004)Is the soft excess in active galactic nuclei real Mon Not Roy Astron Soc 349 L7-L11

[5]

Ho L. C.(2006)An explanation for the soft X-ray excess in active galactic nuclei Mon Not Roy Astron Soc 365 1067-1081

[6]

Gierliński M.(2005)The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI. Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections Astron Astrophys 440 775-782

[7]

Done C.(2004)XMM-Newton EPIC observations of 21 low-redshift PG quasars Astron Astrophys 422 85-95

[8]

Crummy J.(2003)Comptonization in super-eddington accretion flow and growth timescale of supermassive black holes Astrophys J 593 69-84

[9]

Fabian A. C.(2005)A comprehensive range of X-ray ionizedreflection models Mon Not Roy Astron Soc 358 211-216

[10]

Gallo L.(1991)Line profiles from a disk around a rotating black hole Astrophys J 376 90-94

← 1 2 3 →