We present the calibration of the Insight-Hard X-ray Modulation Telescope (Insight-HXMT) X-ray satellite, which can be used to perform timing and spectral studies of bright X-ray sources. Insight-HXMT carries three main payloads onboard: the High Energy X-ray telescope (HE), the Medium Energy X-ray telescope (ME) and the Low Energy X-ray telescope (LE). In orbit, the radioactive sources, activated lines, the fluorescence lines and celestial sources are used to calibrate the energy scale and energy resolution of the payloads. The Crab nebular is adopted as the primary effective area calibrator and empirical functions are constructed to modify the simulated effective areas of the three payloads respectively. The systematic errors of HE, compared to the model of the Crab nebular, are less than 2% in 28--120 keV and 2%--10% above 120 keV. The systematic errors of ME are less than 1.5% in 10--35 keV. The systematic errors of LE are less than 1% in 1--7 keV except the Si K--edge (1.839 keV, up to 1.5%) and less than 2% in 7--10 keV.
@article{arxiv.2003.06998,
title = {In-flight calibration of the Insight-Hard X-ray Modulation Telescope},
author = {Xiaobo Li and Xufang Li and Ying Tan and Yanji Yang and Mingyu Ge and Juan Zhang and Youli Tuo and Baiyang Wu and Jinyuan Liao and Yifei Zhang and Liming Song and Shu Zhang and Jinlu Qu and Shuang-nan Zhang and Fangjun Lu and Yupeng Xu and Congzhan Liu and Xuelei Cao and Yong Chen and Jianyin Nie and Haisheng Zhao and Chengkui Li},
journal= {arXiv preprint arXiv:2003.06998},
year = {2020}
}
Comments
14 pages, 28 figures, accepted by Journal of High Energy Astrophysics