Systematic Study of the Simultaneous Events Detected by GECAM
Abstract
GECAM is a constellation of all-sky monitors in hard X-ray and gamma-ray band primarily aimed at high energy transients such as gamma-ray bursts, soft gamma-ray repeaters, solar flares and terrestrial gamma-ray flashes. As GECAM has the highest temporal resolution (0.1~s) among instruments of its kind, it can identify the so-called simultaneous events (STE) that deposit signals in multiple detectors nearly at the same time (with a 0.3~s window). However, the properties and origin of STE have not yet been explored. In this work, we implemented, for the first time, a comprehensive analysis of the STE detected by GECAM, including their morphology, energy deposition, and the dependence on the geomagnetic coordinates. We find that these STE probably result from direct interactions between high-energy charged cosmic rays and satellite. These results demonstrate that GECAM can detect, identify, and characterize high-energy cosmic rays, making it a Micro Cosmic-Ray Observatory (MICRO) in low Earth orbit.
Cite
@article{arxiv.2602.09544,
title = {Systematic Study of the Simultaneous Events Detected by GECAM},
author = {Yang-Zhao Ren and Feng-Rong Zhu and Shao-Lin Xiong and Yan-Qiu Zhang and Chen-Wei Wang and Jia-Cong Liu and Hao-Xuan Guo and Shuo Xiao and Dong-Ya Guo and Zheng-Hua An and Ce Cai and Pei-Yi Feng and Min Gao and Ke Gong and Yue Huang and Bing Li and Xiao-Bo Li and Xin-Qiao Li and Xiao-Jing Liu and Ya-Qing Liu and Xiang Ma and Wen-Xi Peng and Rui Qiao and Li-Ming Song and Xi-Lei Sun and Wen-Jun Tan and Jin Wang and Jin-Zhou Wang and Ping Wang and Yue Wang and Xiang-Yang Wen and Sheng-Lun Xie and Wang-Chen Xue and Sheng Yang and Qi-Bin Yi and Zheng-Hang Yu and Da-Li Zhang and Fan Zhang and Hong-Mei Zhang and Jin-Peng Zhang and Peng Zhang and Shuang-Nan Zhang and Wen-Long Zhang and Zhen Zhang and Xiao-Yun Zhao and Yi Zhao and Chao Zheng and Shi-Jie Zheng},
journal= {arXiv preprint arXiv:2602.09544},
year = {2026}
}
Comments
15 pages,17 figures