| Literature DB >> 31491288 |
M Amenomori1, Y W Bao2, X J Bi3, D Chen4, T L Chen5, W Y Chen3, Xu Chen3,6, Y Chen2, S W Cui7, L K Ding3, J H Fang3,6, K Fang3, C F Feng8, Zhaoyang Feng3, Z Y Feng9, Qi Gao5, Q B Gou3, Y Q Guo3, H H He3, Z T He7, K Hibino10, N Hotta11, Haibing Hu5, H B Hu3, J Huang3, H Y Jia9, L Jiang3, H B Jin4, F Kajino12, K Kasahara13, Y Katayose14, C Kato15, S Kato16, K Kawata16, M Kozai17, G M Le18, A F Li3,8,19, H J Li5, W J Li3,9, Y H Lin3,6, B Liu2, C Liu3, J S Liu3, M Y Liu5, Y-Q Lou20, H Lu3, X R Meng5, H Mitsui14, K Munakata15, Y Nakamura3, H Nanjo1, M Nishizawa21, M Ohnishi16, I Ohta22, S Ozawa13, X L Qian23, X B Qu24, T Saito25, M Sakata12, T K Sako16, Y Sengoku14, J Shao3,8, M Shibata14, A Shiomi26, H Sugimoto27, M Takita16, Y H Tan3, N Tateyama10, S Torii13, H Tsuchiya28, S Udo10, H Wang3, H R Wu3, L Xue8, K Yagisawa14, Y Yamamoto12, Z Yang3, A F Yuan5, L M Zhai4, H M Zhang3, J L Zhang3, X Zhang2, X Y Zhang8, Y Zhang3, Yi Zhang3, Ying Zhang3, X X Zhou9.
Abstract
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 of photons with E>100 TeV from an astrophysical source.Year: 2019 PMID： 31491288 DOI： 10.1103/PhysRevLett.123.051101
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161