Spectral and timing calibration of eXTP-SFA engineering model in 100XF

IF 2.7 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Experimental Astronomy Pub Date : 2024-06-14 DOI:10.1007/s10686-024-09945-9
Yifan Zhang, Wei Li, Laidan Luo, Dongjie Hou, Yuxuan Zhu, Bin Meng, Zijian Zhao, Dong Xie, Xiongtao Yang, Yanji Yang, Yusa Wang, Yupeng Xu
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Abstract

The spectroscopy focusing array is one of the four main scientific instruments of the enhanced X-ray Timing and Polarimetry mission, tasked with spectral and timing observation in the energy range 0.5-10 keV. An engineering model of the spectroscopy focusing array with a 4 mirror shells assembly and a focal plane detector using commercial detectors has now been developed. To evaluate the performance, the spectral and timing calibration of the engineering model has been held in the 100-m X-ray Test Facility. A multi-target X-ray source with multiple emission lines is used to calibrate the spectral performance. A timing X-ray source based on a grid controlled X-ray tube has been utilized for the timing calibration. The timing X-ray source can generate X-ray pulses to measure the response time distribution, and can also simulate the pulsar lightcurves to examine the detection ability for pulsars. The energy-channel relation and energy resolution are determined through spectral calibration. The energy resolution at 5.95 keV is 142 eV, now. According to the timing calibration, the mean response time of the engineering model is 1.55 \(\upmu \)s, the full width at half maximum of the response time distribution is 0.45 \(\upmu \)s, and the engineering model has sufficient ability to detect the profile of millisecond pulsars.

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在 100XF 中对 eXTP-SFA 工程模型进行频谱和时间校准
光谱聚焦阵列是增强型 X 射线定时和偏振测量飞行任务的四个主要科学仪器之一,其任务是在 0.5-10 千伏的能量范围内进行光谱和定时观测。现在已经开发出了光谱聚焦阵列的工程模型,该阵列具有 4 个镜壳组件和一个使用商用探测器的焦平面探测器。为了评估其性能,在 100 米 X 射线测试设施中对工程模型进行了光谱和定时校准。一个具有多条发射线的多目标 X 射线源用于校准光谱性能。定时校准使用了基于栅格控制 X 射线管的定时 X 射线源。定时 X 射线源可以产生 X 射线脉冲来测量响应时间分布,还可以模拟脉冲星光曲线来检验脉冲星的探测能力。能量通道关系和能量分辨率是通过光谱校准确定的。目前,5.95 keV 的能量分辨率为 142 eV。根据时序校准,工程模型的平均响应时间为 1.55 s,响应时间分布的半最大全宽为 0.45 s,工程模型有足够的能力探测毫秒脉冲星的轮廓。
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来源期刊
Experimental Astronomy
Experimental Astronomy 地学天文-天文与天体物理
CiteScore
5.30
自引率
3.30%
发文量
57
审稿时长
6-12 weeks
期刊介绍: Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments. Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields. Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.
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