Characterization of the Particle-induced Background of XMM-Newton EPIC-pn: Short- and Long-term Variability-猫眼课题宝

DOI：

10.3847/1538-4357/ab698a

发表时间：

2019-08

期刊：

The Astrophysical Journal

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

E. Bulbul;R. Kraft;P. Nulsen;M. Freyberg;E. Miller;C. Grant;M. Bautz;D. Burrows;S. Allen;Tanja Eraerds;V. Fioretti;F. Gastaldello;V. Ghirardini;D. Hall;N. Meidinger;S. Molendi;A. Rau;D. Wilkins;J. Wilms

X射线观测站的粒子诱导背景是由银河宇宙线（GCR）的初级质子、电子和He离子产生的。由于与探测器直接相互作用而产生的事件通常通过机载处理来消除。这些初级粒子与探测器环境的相互作用产生了次级粒子，这些次级粒子模拟了来自天体源的X射线事件，并且更难以识别。XMM-Newton EPIC-pn相机在小窗口模式（SWM）下的滤光轮闭合数据包含X射线类背景事件以及由于与初级粒子直接相互作用而产生的事件。从这些数据中，我们表明，X射线般的背景事件空间相关的初级粒子相互作用。这一结果可用于进一步表征和减少当前和未来任务中硅基X射线探测器的非X射线背景。我们还表明，次级粒子事件的光谱和图案分数是不同的宇宙X射线产生的。

The particle-induced background of X-ray observatories is produced by galactic cosmic ray (GCR) primary protons, electrons, and He ions. Events due to direct interaction with the detector are usually removed by onboard processing. The interactions of these primary particles with the detector environment produce secondary particles that mimic X-ray events from celestial sources, and are much more difficult to identify. The filter-wheel closed data from the XMM-Newton EPIC-pn camera in small window mode (SWM) contains both the X-ray-like background events, and the events due to direct interactions with the primary particles. From this data, we demonstrate that X-ray-like background events are spatially correlated with the primary particle interaction. This result can be used to further characterize and reduce the non-X-ray background in silicon-based X-ray detectors in current and future missions. We also show that spectrum and pattern fractions of secondary particle events are different from those produced by cosmic X-rays.

Characterization of the Particle-induced Background of XMM-Newton EPIC-pn: Short- and Long-term Variability

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