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The First GECAM Observation Results on Terrestrial Gamma-ray Flashes and Terrestrial Electron Beams

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arxiv 2306.10255 v1 pith:WHHVPIRA submitted 2023-06-17 astro-ph.HE astro-ph.EPastro-ph.IM

The First GECAM Observation Results on Terrestrial Gamma-ray Flashes and Terrestrial Electron Beams

Y. Zhao , J. C. Liu , S. L. Xiong , W. C. Xue , Q. B. Yi , G. P. Lu , W. Xu , F. C. Lyu
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J. C. Sun W. X. Peng C. Zheng Y. Q. Zhang C. Cai S. Xiao S. L. Xie C. W. Wang W. J. Tan Z. H. An G. Chen Y. Q. Du Y. Huang M. Gao K. Gong D. Y. Guo J. J. He B. Li G. Li X. Q. Li X. B. Li J. Y. Liao J. Liang X. H. Liang Y. Q. Liu X. Ma R. Qiao L. M. Song X. Y. Song X. L. Sun J. Wang J. Z. Wang P. Wang X. Y. Wen H. Wu Y. B. Xu S. Yang B. X. Zhang D. L. Zhang F. Zhang P. Zhang H. M. Zhang Z. Zhang X. Y. Zhao S. J. Zheng K. K. Zhang X. B. Han H. Y. Wu T. Hu H. Geng H. B. Zhang F. J. Lu S. N. Zhang H. Yu
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classification astro-ph.HE astro-ph.EPastro-ph.IM
keywords gecamterrestrialgamma-raytebstgfsbeamselectronflashes
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abstract

Gravitational-wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is a space-borne instrument dedicated to monitoring high-energy transients, including Terrestrial Gamma-ray Flashes (TGFs) and Terrestrial Electron Beams (TEBs). We implemented a TGF/TEB search algorithm for GECAM, with which 147 bright TGFs, 2 typical TEBs and 2 special TEB-like events are identified during an effective observation time of $\sim$9 months. We show that, with gamma-ray and charged particle detectors, GECAM can effectively identify and distinguish TGFs and TEBs, and measure their temporal and spectral properties in detail. A very high TGF-lightning association rate of $\sim$80\% is obtained between GECAM and GLD360 in east Asia region.

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