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arXiv 1702.02127astro-ph.HEastro-ph.GA
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X射线尘埃散射对磁星1 E 1547.0-5408明亮爆发的影响

The effect of X-ray dust-scattering on a bright burst from the magnetar 1E 1547.0-5408

Fabio Pintore, Sandro Mereghetti, Andrea Tiengo, Giacomo Vianello, Elisa Costantini, Paolo Esposito

摘要:

在2009年2月3日对磁星1 E 1547.0-5408进行的XMM-牛顿观测期间,探测到了一个明亮的爆发,随后是一个持续约10 ks的X射线尾部。SWIFT/BAT也观测到了这一爆发,它的光谱与两个黑体的温度之和很好地拟合,这两个黑体的温度分别为~4 keV和10 keV,能量范围为0.3-150 keV,能量密度为~ 1 e-5 erg/cm 2。X射线尾部的能量密度约为4 e-8 erg/cm 2。由于我们和1 E 1547.0-5408之间的三个尘埃云的距离和相对光学深度的知识,我们表明,在尾部的大多数X射线可以解释的爆发发射的尘埃散射,除了前20-30秒。我们指出,其他X射线尾巴观察到强磁星爆发后,可能包含一个不可忽略的贡献,由于尘埃散射。

英文摘要:

A bright burst, followed by an X-ray tail lasting ~10 ks, was detected during an XMM-Newton observation of the magnetar 1E 1547.0-5408 carried out on 2009 February 3. The burst, also observed by SWIFT/BAT, had a spectrum well fit by the sum of two blackbodies with temperatures of ~4 keV and 10 keV and a fluence in the 0.3-150 keV energy range of ~1e-5 erg/cm2. The X-ray tail had a fluence of ~4e-8 erg/cm2. Thanks to the knowledge of the distances and relative optical depths of three dust clouds between us and 1E 1547.0-5408, we show that most of the X-rays in the tail can be explained by dust scattering of the burst emission, except for the first ~20-30 s. We point out that other X-ray tails observed after strong magnetar bursts may contain a non-negligible contribution due to dust scattering.

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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