Implementation of the Polarimetry Focusing Telescope Array Observation Simulator on board the X-Ray Timing and Polarimetry Observatory
Implementation of the Polarimetry Focusing Telescope Array Observation Simulator on board the X-Ray Timing and Polarimetry Observatory
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X射线授时与旋光天文台上旋光聚焦望远镜阵列观测模拟器的实现
DOI：
10.3847/1538-4357/ac7b82
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
F. Lu
中科院分区：
文献类型：
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作者：
L. Qi;Gang Li;M. Ge;Juan Zhang;Weichun Jiang;Xiaohua Liu;Sheng Yang;Yuanyuan Du;Zefang Dong;Yanji Yang;Xiaojing Liu;Liang Sun;Jiechen Jiang;Jia;Tianxiang Chen;Yang Jiao;Bo;Huilin He;Yupeng Xu;F. Lu
在逐个事件的基础上，为计划中的增强型X射线定时和极化天文台(EXTP)上的偏振聚焦望远镜阵列(PFA)建立了一个观测模拟器。基于XIMPOL的事件发生器被用来采集到达望远镜孔径的X射线的参数。利用GEANT4内置的光学和探测器模拟模型计算X射线通过望远镜和相应次级物体的轨迹和相互作用，然后将其转化为像素化读出电子设备中的信号。结果表明，光学模拟模型需要镜面形变，探测器模拟模型需要电离电子的输运来再现望远镜的整体性能。所开发的工具可用于不同的飞行任务阶段，如设计阶段的有效载荷优化、校准阶段的新现象与已知物理模型的区分以及观测规划中对潜在偏振X射线源的敏感性研究。研究了PFA对蟹状星云和蟹状脉冲星的灵敏度，以演示该工具的应用。即使有稀释效应，空间分辨和相分辨偏振测量也可以揭示蟹状星云和蟹状脉冲星的重要方面，并有助于打破不同模型之间的简并。
An observation simulator is established, on an event-by-event basis, for the Polarimetry Focusing telescope Array (PFA) on board the planned enhanced X-ray Timing and Polarimetry observatory (eXTP). An event generator, based on XIMPOL, is used to sample the parameters of the X-rays reaching the aperture of the telescope. The trajectories and interactions of X-rays through the telescope and the corresponding secondaries are calculated using the optics and detector simulation model built in GEANT4, before being translated into signals in the pixelated readout electronics. It is shown that mirror deformation is required for the optics simulation model, and transportation of ionization electrons is required for the detector simulation model to reproduce the overall performance of the telescope. The developed tool is useful in different mission phases, such as payload optimization in the design phase, discrimination of new phenomena against known physics models in the calibration phases, and sensitivity studies of potential polarized X-ray sources in observation planning. The sensitivity of PFA to the Crab Nebula and Crab pulsar is investigated to demonstrate the application of the tool. Even with the dilution effect, space-resolved and phase-resolved polarimetry can reveal important aspects of the Crab Nebula and Crab pulsar and help break the degeneracy between different models.
蟹状星云 X 射线光谱的空间变化
DOI：
--
发表时间：
2004
期刊：
Ap. J. (in press)
影响因子：
--
作者：
Mori;K.;Burrows;D.N.;Hester;J.J.;Pavlov;G.G.;Shibata;S.;Tsunemi;H.
通讯作者：
H.