First Detection of Ultrahigh Energy Emission from Gamma-Ray Binary LS I + 61 ° 303

作者：Z D Cao, F. Aharonian, Y. X. Bai, Yiwang Bao, D. Bastieri, Xiao-Jun Bi, Y.J Bi, W Bian, A. V. Bukevich, C. M. Cai, W. Y. Cao, Z D Cao, J. Chang, J. F. Chang, A. M. Chen, E. S. Chen, G. H. Chen, H. X. Chen, Liang Chen, Long Chen, Liang Chen, Long Chen, Q. H. Chen, S. Z. Chen, Shengyong Chen, S K Chen, Shengyong Chen, X. B. Chen, Y.D Cheng, Y. Chen, N. Cheng, Y. D. Cheng, M. C. Chu, Maxwell Cui, S. W. Cui, X. H. Cui, Y M Cui, Bowei Dai, H. L. Dai, Z. G. Dai, Danzengluobu, Y. X. Diao, X Q Dong, K. K. Duan, J. H. Fan, Y. Z. Fan, J. Fang, J. H. Fang, K. Fang, Y. L. Feng, H. Feng, L. Feng, Kai Fang, X H Feng, H Feng, Li Feng, S. Gabici, B. Gao, C. D. Gao, Q. Gao, Wei Gao, Bin Gao, M. M. Ge, T. T. Ge, L. S. Geng, Gwenael Giacinti, G. Gong, Q. B. Gou, M. H. Gu, F.L. 福来 Guo 郭, Jing Guo, Xu Guo, Yi Guo, Jing Guo, Y.A Han, O. A. Hannuksela, M. Hasan, H. He, H. He, H. B. Hu, Xing‐Xiang He, Y. He, S. Hernández-Cadena, Bowen Hou, C. Hou, X. Hou, H. B. Hu, S. C. Hu, Chun-Hao P. Huang, D.H Huang, Jian‐Jang Huang, Ting Huang, Chun-Hao P. Huang, XJ Huang, X. Y. Huang, Y. Huang, Yu Huang, X. L. Ji, H. Y. Jia, K. Jia, H Q Jiang, K. Jiang, X. W. Jiang, Ke Jia, S. In, S Kaci, M. M. Kang, I. Karpikov, D. Khangulyan, D. Kuleshov, K. Kurinov, Bing Li, Cheng Li, Cong Li, Di Li, Fei Li, Cong Li, Di Li, Jian Li, Jie Li, Li K, Lili Li, Jie Li, Kai Li, Lili Li, Weiwei Li, X Q Li, X. Li, H.D Liu, Jia Liu, J.L Liu, Zhe Li, Zhuo Li, Y. F. Liang, S. J. Lin, B. Liu, Chao Liu, Chao Liu, D Y Liu, H. Liu, H. D. Liu, J. L. Liu, J. L. Liu, J. R. Liu, M.Y. Liu, R.-Y. Liu, S. M. Liu, Wenyao Liu, X. Li, Liu Y, Liu Y, Yu‐Rong Liu, Yidong Lou, Qiang Luo, Yi Luo, H. K. Lv, B.Q Ma, L. L. Ma, X. H. Ma, J. R. Mao, Z. Min, W. Mitthumsiri, Guobin Mou, H. J. Mu, A. Neronov, K.C.Y Ng, M. Y. Ni, L. S. Nie, L.J Ou, P. Pattarakijwanich, Z. Y. Pei, J. C. Qi, M. Y. Qi, J. J. Qin, A. Raza, C. Y. Ren, D. Ruffolo, A. Sáiz, D. Semikoz, L. Shao, O. Shchegolev, Ya-Ching Shen, X. D. Sheng, Z.D Shi, F. W. Shu, H. C. Song, Yu. V. Stenkin, V. Stepanov, Yi Su, Sun D, H. Sun, Q. N. Sun, X.N Sun, Z. B. Sun, N.H Tabasam, J. Takata, P. H.T. Tam, H. B. Tan, Q. W. Tang, R. Tang, Z.B Tang, Tian Wh, C. N. Tong, L. H. Wan, C Wang, G. W. Wang, H. G. Wang, J. C. Wang, K. Wang, Kai Wang, Kai Wang, L. Y. Wang, L. Y. Wang, L. Y. Wang, R. Wang, Wei Wang, Kai Wang, X. J. Wang, X Wang, Y. Wang, Ruoju Wang, Wei Wang, Z. X. Wang, Z P Wang, D. M. Wei, Wei J, Y. Wei, T. Wen, S.S Weng, C. Y. Wu, H B Wu, Q. W. Wu, S. Wu, X. F. Wu, Y. S. Wu, Shichuan Xi, J. Xia, J. J. Xia, G. M. Xiang, Dong Xiao, Guoqing Xiao, Y. Xin, Y. Xing, D. R. Xiong, Zhiqiang Xiong, D. L. Xu, R. F. Xu, R A N Xu, W Xu, L. Xue, D.H Yan, J B Yan, T. Yan, C R Yang, C. Y. Yang, F. F. Yang, Lili Yang, M. J. Yang, R. Z. Yang, W.X Yang, Z. H. Yang, Ting Yan, X. A. Ye, L. Q. Yin, N. Yin, X. H. You, Z. Y. You, Q P Yuan, H. Yue, H. D. Zeng, T. X. Zeng, W. Zeng, X. T. Zeng, M. Zha, B Zhang, B. T. Zhang, C. Zhang, F Zhang, H. Zhang, Hailong Zhang, Hailong Zhang, J. L. Zhang, Li Zhang, P. F. Zhang, P. P. Zhang, Rui Zhang, Jianzhong Zhang, Jianzhong Zhang, Jianzhong Zhang, Xi Zhang, Xi Zhang, Yi Zhang, Yong Zhang, Rui Zhang, J. Zhao, L. Zhao, L. Z. Zhao, S. P. Zhao, X. H. Zhao, Z. H. Zhao, F. Zheng, Yi Zhang, Bin Zhou, HJ Zhou, J. Zhao, M. Zhou, P. Zhou, R. Zhou, X. X. Zhou, X. X. Zhou, Baohua Zhu, C. G. Zhu, Bin Zhou, H. Zhou, K. J. Zhu, Mei Zhou, X. Zuo · 发表于：Physical Review Letters · 年份：2026 · DOI：10.1103/7xhp-tff7 · 被引用次数：2 · 研究领域：Astrophysics and Cosmic Phenomena、Astrophysical Phenomena and Observations、Gamma-ray bursts and supernovae

We report the first detection of gamma-ray emission up to ultrahigh-energy (UHE; >100 TeV) emission from the prototypical gamma-ray binary system LS I +61° 303 using data from the Large High Altitude Air Shower Observatory. It is detected with significances of 9.2σ in the Water Cherenkov Detector Array (WCDA, 1.4-30.5 TeV) and 6.2σ in the Kilometer Square Array (KM2A, 25-267 TeV); in KM2A alone we identify 16 photonlike events above 100 TeV against an estimated 5.1 background events, corresponding to a 3.8σ detection. These results provide compelling evidence of extreme particle acceleration in LS I +61° 303. Furthermore, we observe orbital modulation at 3.9σ confidence level, between 25 and 100 TeV, with a hint that the orbital modulation is energy dependent. These features can be understood in a composite scenario in which leptonic and hadronic processes jointly contribute.