Performance of LHAASO-WCDA and observation of the Crab Nebula as a standard candle
文献类型:期刊论文
作者 | Aharonian, F.6,7; An, Q.28,29; Axikegu13; Bai, L.X.12; Bai, Y.X.30,32; Bao, Y.W.18; Bastieri, D.23; Bi, X.J.30,31,32; Bi, Y.J.30,32; Cai, H.10 |
刊名 | CHINESE PHYSICS C |
出版日期 | 2021-08 |
卷号 | 45期号:8 |
ISSN号 | 1674-1137 |
关键词 | LHAASO-WCDA Crab Nebula angular resolution spectral energy distribution |
DOI | 10.1088/1674-1137/ac041b |
产权排序 | 第25完成单位 |
文献子类 | Article |
英文摘要 | The first Water Cherenkov detector of the LHAASO experiment (WCDA-1) has been operating since April 2019. The data for the first year have been analyzed to test its performance by observing the Crab Nebula as a standard candle. The WCDA-1 achieves a sensitivity of 65 mCU per year, with a statistical threshold of 5 sigma. To accomplish this, a 97.7% cosmic-ray background rejection rate around 1 TeV and 99.8% around 6 TeV with an approximate photon acceptance of 50% is achieved after applying an algorithm to separate gamma-induced showers. The angular resolution is measured using the Crab Nebula as a point source to be approximately 0.45 degrees at 1 TeV and better than 0.2 degrees above 6 TeV, with a pointing accuracy better than 0.05 degrees. These values all match the design specifications. The energy resolution is found to be 33% for gamma rays around 6 TeV. The spectral energy distribution of the Crab Nebula in the range from 500 GeV to 15.8 TeV is measured and found to be in agreement with the results from other TeV gamma ray observatories. |
学科主题 | 物理学 ; 高能物理学 ; 天文学 ; 天体物理学 ; 高能天体物理学 |
URL标识 | 查看原文 |
出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
WOS关键词 | TEV ; SPECTRUM ; TIBET ; ENERGY |
资助项目 | National Key R&D program of China[2018YFA0404201] ; National Key R&D program of China[2018YFA0404202] ; National Key R&D program of China[2018YFA0404203] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12022502] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11905227] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[U1931112] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11635011] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11761141001] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[Y811A35] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[11675187] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[U1831208] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[U1931111] ; Thailand Science Research and Innovation[RTA6280002] |
WOS研究方向 | Physics |
语种 | 英语 |
出版者 | IOP Publishing Ltd |
WOS记录号 | WOS:000739534700001 |
资助机构 | National Key R&D program of China[2018YFA0404201, 2018YFA0404202, 2018YFA0404203] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC)[12022502, 11905227, U1931112, 11635011, 11761141001, Y811A35, 11675187, U1831208, U1931111] ; Thailand Science Research and Innovation[RTA6280002] |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24778] |
专题 | 云南天文台_高能天体物理研究组 星系类星体研究组 |
通讯作者 | Cao, Z.; Cao, Z.; Feng, L.; Hou X(侯贤); Li, Y.; Wang, Z.H.; Wu, H.R.; You, Z.Y. |
作者单位 | 1.Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand 2.Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, 24 Quai Ernest Ansermet, Geneva 1211, Switzerland; 3.Moscow Institute of Physics and Technology, Moscow 141700, Russia; 4.Institute for Nuclear Research of Russian Academy of Sciences, Moscow 117312, Russia; 5.Dipartimento di Fisica dell'Università di Napoli 6.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, Heidelberg 69029, Germany; 7.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2 Dublin, Ireland; 8.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China; 9.School of Physics and Astronomy, Yunnan University, Kunming 650091, China; 10.School of Physics and Technology, Wuhan University, Wuhan 430072, China; |
推荐引用方式 GB/T 7714 | Aharonian, F.,An, Q.,Axikegu,et al. Performance of LHAASO-WCDA and observation of the Crab Nebula as a standard candle[J]. CHINESE PHYSICS C,2021,45(8). |
APA | Aharonian, F..,An, Q..,Axikegu.,Bai, L.X..,Bai, Y.X..,...&Zuo, X..(2021).Performance of LHAASO-WCDA and observation of the Crab Nebula as a standard candle.CHINESE PHYSICS C,45(8). |
MLA | Aharonian, F.,et al."Performance of LHAASO-WCDA and observation of the Crab Nebula as a standard candle".CHINESE PHYSICS C 45.8(2021). |
入库方式: OAI收割
来源:云南天文台
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