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<p>The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is designed to detect high-energy transients, which may result in extremely high counting rate in detectors, therefore a comprehensive study of the detector’s response under such conditions is crucial. At very high rates, instrumental effects such as data saturation and energy spectrum distortion could occur, which must be corrected in the analysis of observation data. In this work, we systematically simulated the electronic components and readout system of GECAM to investigate the instrumental effects under extremely high counts rate in detectors, and briefly discussed the correction approach. Our results show that the actually measured and simulated energy spectra are well consistent, validating our simulation and approach. This study provided important support to the successful GECAM measurements of extremely bright burst events, including the historical GRB 221009A and GRB 230307A.</p>

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GECAM detector performance at very high count rates

  • 期刊论文

  • 发表日期：

    2026年4月26日

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  • Jia-Cong Liu,
  • Shao-Lin Xiong,
  • Ya-Qing Liu,
  • Ke Gong,
  • Wen-Xi Peng,
  • Xiang-Yang Wen,
  • Xin-Qiao Li,
  • Zheng-Hua An,
  • Da-Li Zhang,
  • Yan-Qiu Zhang,
  • Chao Zheng,
  • Wang-Chen Xue,
  • Chen-Wei Wang,
  • Wen-Jun Tan,
  • Yan-Bing Xu,
  • Xi-Lei Sun,
  • Dong-Ya Guo,
  • Rui Qiao,
  • Hao Geng

摘要

The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is designed to detect high-energy transients, which may result in extremely high counting rate in detectors, therefore a comprehensive study of the detector’s response under such conditions is crucial. At very high rates, instrumental effects such as data saturation and energy spectrum distortion could occur, which must be corrected in the analysis of observation data. In this work, we systematically simulated the electronic components and readout system of GECAM to investigate the instrumental effects under extremely high counts rate in detectors, and briefly discussed the correction approach. Our results show that the actually measured and simulated energy spectra are well consistent, validating our simulation and approach. This study provided important support to the successful GECAM measurements of extremely bright burst events, including the historical GRB 221009A and GRB 230307A.