Observation of the Crab Nebula with LHAASO-KM2A-a performance study
文献类型:期刊论文
作者 | Aharonian, F.26,27; An, Q.4,5; Axikegu20; Bai, L. X.21; Bai, Y. X.1,3; Bao, Y. W.15; Bastieri, D.10; Bi, X. J.1,2,3; Bi, Y. J.1,3; Cai, H.23 |
刊名 | CHINESE PHYSICS C |
出版日期 | 2021-02-01 |
卷号 | 45期号:2页码:13 |
ISSN号 | 1674-1137 |
关键词 | gamma-ray Crab Nebula extensive air showers cosmic rays |
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 |
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.Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China 2.University of Chinese Academy of Sciences, 100049 Beijing, China 3.TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China 4.State Key Laboratory of Particle Detection and Electronics, China 5.University of Science and Technology of China, 230026 Hefei, Anhui, China 6.Department of Engineering Physics, Tsinghua University, 100084 Beijing, China 7.National Astronomical Observatories, Chinese Academy of Sciences, 100101 Beijing, China 8.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, China 9.School of Physics, Peking University, 100871 Beijing, China 10.Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, 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..,...&Hou 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. |
入库方式: OAI收割
来源:云南天文台
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