Observation of the Crab Nebula with LHAASO-KM2A-a performance study | |
Aharonian, F.13,14; An, Q.26,27; Axikegu7; Bai, L. X.8; Bai, Y. X.28,30; Bao, Y. W.3; Bastieri, D.21; Bi, X. J.28,29,30; Bi, Y. J.28,30; Cai, H.10 | |
刊名 | CHINESE PHYSICS C |
2021-02-01 | |
卷号 | 45期号:2页码:13 |
关键词 | gamma-ray Crab Nebula extensive air showers cosmic rays |
ISSN号 | 1674-1137 |
DOI | 10.1088/1674-1137/abd01b |
产权排序 | 第25完成单位 |
文献子类 | Article |
英文摘要 | A sub-array of the Large High Altitude Air Shower Observatory (LHAASO), KM2A is mainly designed to observe a large fraction of the northern sky to hunt for gamma-ray sources at energies above 10 TeV. Even though the detector construction is still underway, half of the KM2A array has been operating stably since the end of 2019. In this paper, we present the KM2A data analysis pipeline and the first observation of the Crab Nebula, a standard candle in very high energy gamma-ray astronomy. We detect.-ray signals from the Crab Nebula in both energy ranges of 10 100 TeV and 100 TeV with high significance, by analyzing the KM2A data of 136 live days between December 2019 and May 2020. With the observations, we test the detector performance, including angular resolution, pointing accuracy and cosmic-ray background rejection power. The energy spectrum of the Crab Nebula in the energy range 10-250 TeV fits well with a single power-law function dN/dE = (1.13 +/- 0.05(stat)+/- 0.08(sys))x10(-14) . (E/20 TeV)(-3.09 +/- 0.06stat +/- 0.02sys) cm(-2) s(-1) TeV. It is consistent with previous measurements by other experiments. This opens a new window of gamma-ray astronomy above 0.1 PeV through which new ultrahigh-energy gamma-ray phenomena, such as cosmic PeVatrons, might be discovered. |
学科主题 | 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 |
资助项目 | Chengdu Management Committee of Tianfu New Area |
WOS研究方向 | Physics |
语种 | 英语 |
出版者 | IOP PUBLISHING LTD |
WOS记录号 | WOS:000614054500001 |
资助机构 | Chengdu Management Committee of Tianfu New Area |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/24129] |
专题 | 云南天文台_丽江天文观测站(南方基地) |
通讯作者 | Aharonian, F. |
作者单位 | 1.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, China 2.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China 3.School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China 4.School of Physics and Microelectronics, Zhengzhou University, 450001 Zhengzhou, Henan, China 5.Hebei Normal University, 050024 Shijiazhuang, Hebei, China 6.School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, China 7.School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China 8.College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China 9.Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, 850000 Lhasa, Tibet, China 10.School of Physics and Technology, Wuhan University, 430072 Wuhan, Hubei, China |
推荐引用方式 GB/T 7714 | Aharonian, F.,An, Q.,Axikegu,et al. Observation of the Crab Nebula with LHAASO-KM2A-a performance study[J]. CHINESE PHYSICS C,2021,45(2):13. |
APA | Aharonian, F..,An, Q..,Axikegu.,Bai, L. X..,Bai, Y. X..,...&Zuo, X..(2021).Observation of the Crab Nebula with LHAASO-KM2A-a performance study.CHINESE PHYSICS C,45(2),13. |
MLA | Aharonian, F.,et al."Observation of the Crab Nebula with LHAASO-KM2A-a performance study".CHINESE PHYSICS C 45.2(2021):13. |
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