A REMARKABLE LONG-TERM LIGHT CURVE AND DEEP, LOW-STATE SPECTROSCOPY: SWIFT AND XMM-NEWTON MONITORING OF THE NLS1 GALAXY Mkn 335
文献类型：期刊论文
| 作者 | Grupe, Dirk1; Komossa, S.2,3,4; Gallo, Luigi C.5; Longinotti, Anna Lia6,7; Fabian, Andrew C.8; Pradhan, Anil K.9; Gruberbauer, Michael5; Xu, Dawei10
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| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
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| 出版日期 | 2012-04-01 |
| 卷号 | 199期号:2 |
| 关键词 | galaxies: active galaxies: individual (Mkn 335) galaxies: Seyfert X-rays: galaxies |
| 英文摘要 | The narrow-line Seyfert 1 galaxy (NLS1) Mkn 335 is remarkable because it has repeatedly shown deep, long X-ray low states that show pronounced spectral structure. It has become one of the prototype active galactic nuclei (AGNs) in deep minimum X-ray states. Here we report on the continuation of our ongoing monitoring campaign with Swift and the examination of the low-state X-ray spectra based on a 200 ks triggered observation with XMM-Newton in 2009 June. Swift has continuously monitored Mkn 335 since 2007 May typically on a monthly basis. This is one of the longest simultaneous UV/X-ray light curves so far obtained for an AGN. Mkn 335 has shown strong X-ray variability even on timescales of hours. In the UV, it turns out to be one of the most variable among NLS1s. Long-term Swift monitoring allows us to examine correlations between the UV, X-rays, and X-ray hardness ratios. We find no significant correlation or lag between the UV and X-ray variability; however, we do find distinct trends in the behavior of the hardness ratio variability. The hardness ratio and count rate are correlated in the low-flux state, but no correlation is seen in the high state. The X-ray low-state spectra of the 2007 and 2009 XMM-Newton observations display significant spectral variability. We fit the X-ray spectra with a suite of phenomenological models in order to characterize the data. The broadband CCD spectrum can be fitted equally well with partial absorption and blurred reflection models. These more complicated models are explored in further detail in upcoming work. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000303105400004 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6328]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA 2.Tech Univ Munich, Fak Phys, D-85748 Garching, Germany 3.TUM, D-85748 Garching, Germany 4.Max Planck Inst Plasma Phys, D-85748 Garching, Germany 5.St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada 6.MIT Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA 7.ESAC, XMM Newton Sci Operat Ctr, Madrid 28691, Spain 8.Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England 9.Ohio State Univ, Dept Astron, Columbus, OH 43210 USA 10.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Grupe, Dirk,Komossa, S.,Gallo, Luigi C.,et al. A REMARKABLE LONG-TERM LIGHT CURVE AND DEEP, LOW-STATE SPECTROSCOPY: SWIFT AND XMM-NEWTON MONITORING OF THE NLS1 GALAXY Mkn 335[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2012,199(2). |
| APA | Grupe, Dirk.,Komossa, S..,Gallo, Luigi C..,Longinotti, Anna Lia.,Fabian, Andrew C..,...&Xu, Dawei.(2012).A REMARKABLE LONG-TERM LIGHT CURVE AND DEEP, LOW-STATE SPECTROSCOPY: SWIFT AND XMM-NEWTON MONITORING OF THE NLS1 GALAXY Mkn 335.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,199(2). |
| MLA | Grupe, Dirk,et al."A REMARKABLE LONG-TERM LIGHT CURVE AND DEEP, LOW-STATE SPECTROSCOPY: SWIFT AND XMM-NEWTON MONITORING OF THE NLS1 GALAXY Mkn 335".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 199.2(2012). |
入库方式： OAI收割
来源：国家天文台
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