Result of proton beam energy calibration of GECAM satellite charged particle detector

Zhang, Chaoyue; Liang, X. H.; Xu, Y. B.; Peng, W. X.; He, J.; Guo, D. Y.; Gong, Ke; Liu, Yaqing; An, Zhu; Zhang, Dali; Yang, S.; Liu, Xiaojing; Wen, Xiang-Yang; Qiao, Rui; Wang, Jinzhou; Gao, Min; Xiong, S. L.; Zhang, Fan; Li, Xinqiao; Cui, Xuejun; Li, Chaoyang; Tang, Jilong; Wang, Xiaohua; Wang, Dengkui; Wei, Zhipeng

doi:10.1007/s41605-021-00264-7

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…and alert data are generated by the in-flight trigger and localization software, which is executed on the data management board of the EBOX (Li et al 2022b). Since the CPDs have low detection efficiency to gamma rays (Li et al 2022a;Xu et al 2022;Zhang et al 2022a), we only use 25 GRDs to compute burst localization. The pointing directions of the GRDs in GECAM payload coordinates are listed in Table 2.…”

Section: The Gecam Instrumentmentioning

confidence: 99%

“…Launched in 2020 December, GECAM has been operating in low Earth orbit (600 km altitude and 29°inclination angle, Han et al 2020). GECAM consists of twin microsatellites (i.e., GECAM-A and GECAM-B) and each comprises 25 gammaray detectors (GRDs, Lv et al 2018;Zhang et al 2019;An et al 2022) and eight charged particle detectors (CPDs, Li et al 2022a;Xu et al 2022;Zhang et al 2022a). With the LaBr 3 crystal read out by a silicon photomultiplier array, GRDs could monitor the entire unocculted sky in the energy range of ∼15 keV to ∼5 MeV (Zhang et al 2022b(Zhang et al , 2022d.…”

Section: Introductionmentioning

confidence: 99%

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GECAM Localization of High-energy Transients and the Systematic Error

Zhao

Xue

Xiong³

et al. 2023

ApJS

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The Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a pair of microsatellites (i.e., GECAM-A and GECAM-B) dedicated to monitoring gamma-ray transients including the high-energy electromagnetic counterparts of gravitational waves, such as gamma-ray bursts, soft gamma-ray repeaters, solar flares, and terrestrial gamma-ray flashes. Since launch in 2020 December, GECAM-B has detected hundreds of astronomical and terrestrial events. For these bursts, localization is the key for burst identification and classification as well as follow-up observations in multiple wavelengths. Here, we propose a Bayesian localization method with Poisson data with Gaussian background profile likelihood to localize GECAM bursts based on the distribution of burst counts in detectors with different orientations. We demonstrate that this method can work well for all kinds of bursts, especially extremely short ones. In addition, we propose a new method to estimate the systematic error of localization based on a confidence level test, which can overcome some problems of the existing method in the literature. We validate this method by Monte Carlo simulations, and then apply it to a burst sample with accurate location and find that the mean value of the systematic error of GECAM-B localization is ∼2.°5. By considering this systematic error, we can obtain a reliable localization probability map for GECAM bursts. Our methods can be applied to other gamma-ray monitors.

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Section: The Gecam Instrumentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

GECAM Localization of High-energy Transients and the Systematic Error

Zhao

Xue

Xiong³

et al. 2023

ApJS

Self Cite

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On-ground calibration of low gain response for Gamma-Ray Detectors onboard the GECAM satellite

Peng

Liu

et al. 2023

Exp Astron

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Development and Calibration of a Three-Directional High-Energy Particle Detector for FY-3E Satellite

et al. 2023

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According to the characteristics of the LEO space particles radiation environment of China’s Fengyun No. 3 (FY-3) polar-orbiting meteorological satellites, in order to monitor the characteristics, and space–time distribution of charged particle radiation in the orbit space, it is proposed to install a three-directional high-energy particle detector (HEPD) in the three vertical orthogonal directions of FY-3E, so as to carry out the energy spectrum and flux observation of high-energy protons and electrons in the three directions of the satellite, namely, −X, +Y, and −Z. The on-orbit detection data acquired by these payloads can be used for space environment modeling and solar-terrestrial physics research, and provide data sources for operational space environment weather warning and forecasting. Through the ground accelerator calibration experiment and simulation analysis of the three-directional HEPDs developed in the flight model phase, the experimental results show that all the HEPDs’ measured values meet the requirements for technical indexes, such as the detection energy range (high-energy protons: 3–300 MeV; high-energy electrons: 0.15–5.7 MeV), energy span accuracy (<15%), flux accuracy (<15%), and sensitivity (<5% (ΔN/N)).

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Result of proton beam energy calibration of GECAM satellite charged particle detector

Cited by 3 publications

References 7 publications

GECAM Localization of High-energy Transients and the Systematic Error

GECAM Localization of High-energy Transients and the Systematic Error

On-ground calibration of low gain response for Gamma-Ray Detectors onboard the GECAM satellite

Development and Calibration of a Three-Directional High-Energy Particle Detector for FY-3E Satellite

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