# First Detection of Photons with Energy beyond 100 TeV from an Astrophysical Source.

@article{Amenomori2019FirstDO,
title={First Detection of Photons with Energy beyond 100 TeV from an Astrophysical Source.},
author={Michihiro Amenomori and Yiwei Bao and Xiao-Jun Bi and D. Y. Chen and T. L. Chen and W. Y. Chen and Xu Chen and Y Chen and Cirennima and S. W. Cui and Danzengluobu and Liming Ding and J. H. Fang and Kun Fang and C. F. Feng and Zhaoyang Feng and Z. Y. Feng and Qi Gao and Quan-bu Gou and Y. Q. Guo and H H He and Z. T. He and K. Hibino and Naoki Hotta and Haibing Hu and H. B. Hu and J. Huang and Huan-yu Jia and L. Jiang and H. B. Jin and Fumiyoshi Kajino and K. Kasahara and Y. Katayose and Chihiro Kato and Shigeaki Kato and K. Kawata and M. Kozai and Labaciren and Guiming Le and A. F. Li and H. J. Li and W. J. Li and Y. H. Lin and B. Liu and C X Liu and J. S. Liu and M. Y. Liu and Yu-qing Lou and H. Lu and X. R. Meng and H. Mitsui and K. Munakata and Y. Nakamura and Hajime Nanjo and Mitsuhiro Nishizawa and Munehiro Ohnishi and Itaru Ohta and Shohei Ozawa and X. Qian and Xiao-bo Qu and T. Saito and M. Sakata and Toshiaki Sako and Yasuhito Sengoku and J. Shao and M. Shibata and A. Shiomi and Hidehiko Sugimoto and Masatoshi Takita and Y. H. Tan and Nobuhito Tateyama and Shoji Torii and H. Tsuchiya and Sunday O. Udo and H. Wang and H. r. Wu and Liang Xue and Kazuki Yagisawa and Y. Yamamoto and Z. Yang and A. F. Yuan and Liuming Zhai and H. M. Zhang and J. L. Zhang and X. Zhang and X. Y. Zhang and Y. Zhang and Yi. Zhang and Ying Zhang and Zhaxisangzhu and X. X. Zhou},
journal={Physical review letters},
year={2019},
volume={123 5},
pages={
051101
}
}
• Published 13 June 2019
• Physics
• Physical review letters
We report on the highest energy photons from the Crab Nebula observed by the Tibet air shower array with the underground water-Cherenkov-type muon detector array. Based on the criterion of a muon number measured in an air shower, we successfully suppress 99.92% of the cosmic-ray background events with energies E>100  TeV. As a result, we observed 24 photonlike events with E>100  TeV against 5.5 background events, which corresponds to a 5.6σ statistical significance. This is the first detection…

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