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

被引:0
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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;
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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.
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页码:207 / 211
页数:4
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