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arXiv 1601.02702astro-ph.HE
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Suzaku确认NGC ~3660是未吸收的Seyfert 2

Suzaku Confirms NGC~3660 is an Unabsorbed Seyfert 2

E. Rivers, M. Brightman, S. Bianchi, G. Matt, K. Nandra, Y. Ueda

摘要:

一组神秘的天体,未被吸收的塞弗特2s可能具有本质上弱的宽线区域,在BLR的视线中而不是X射线日冕,或者如此多的遮蔽,以至于X射线连续谱被完全抑制,并且观察到的光谱实际上从附近的物质散射到视线中。NGC 3660已经被证明具有弱的宽光学/近红外线,在软X射线波段没有遮蔽,并且没有“改变外观”行为的迹象。Beppo-SAX以前对该源的唯一硬X射线探测似乎表明,该源可能含有一个严重模糊的核。然而,我们对朱雀星长期观测的分析表明,情况并非如此,该源具有典型的幂律X射线连续谱,具有正常反射,没有遮蔽。我们的结论是,NGC 3660被证实没有不明的遮蔽,并且异常高的Beppo-SAX测量值必须是由于源混淆或类似的原因,与我们的朱雀测量值以及Swift-BAT和RXTE的未检测到不一致。

英文摘要:

An enigmatic group of objects, unabsorbed Seyfert 2s may have intrinsically weak broad line regions, obscuration in the line of sight to the BLR but not to the X-ray corona, or so much obscuration that the X-ray continuum is completely suppressed and the observed spectrum is actually scattered into the line of sight from nearby material. NGC 3660 has been shown to have weak broad optical/near infrared lines, no obscuration in the soft X-ray band, and no indication of "changing look" behavior. The only previous hard X-ray detection of this source by Beppo-SAX seemed to indicate that the source might harbor a heavily obscured nucleus. However, our analysis of a long-look Suzaku observation of this source shows that this is not the case, and that this source has a typical power law X-ray continuum with normal reflection and no obscuration. We conclude that NGC 3660 is confirmed to have no unidentified obscuration and that the anomolously high Beppo-SAX measurement must be due to source confusion or similar, being inconsistent with our Suzaku measurements as well as non-detections from Swift-BAT and RXTE.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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