NAOC Open IR
Observation of the Crab Nebula with LHAASO-KM2A-a performance study
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2021-02-01
Source PublicationCHINESE PHYSICS C
ISSN1674-1137
Volume45Issue:2Pages:13
AbstractA 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.
Keywordgamma-ray Crab Nebula extensive air showers cosmic rays
Funding OrganizationChengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area
DOI10.1088/1674-1137/abd01b
Language英语
Funding ProjectChengdu Management Committee of Tianfu New Area
Funding OrganizationChengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area ; Chengdu Management Committee of Tianfu New Area
WOS Research AreaPhysics
WOS SubjectPhysics, Nuclear ; Physics, Particles & Fields
WOS IDWOS:000614054500001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/79685
Collection中国科学院国家天文台
Corresponding AuthorAharonian, F.
Affiliation1.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophy, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst High Energy Phys, Expt Phys Div, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Comp Ctr, Inst High Energy Phys, Beijing 100049, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.TIANFU Cosm Ray Res Ctr, Chengdu, Sichuan, Peoples R China
6.State Key Lab Particle Detect & Elect, Beijing, Peoples R China
7.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
8.Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
9.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China
10.Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China
11.Peking Univ, Sch Phys, Beijing 100871, Peoples R China
12.Guangzhou Univ, Ctr Astrophys, Guangzhou 510006, Guangdong, Peoples R China
13.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519000, Guangdong, Peoples R China
14.Sun Yat Sen Univ, Sch Phys Guangzhou, Zhuhai 519000, Guangdong, Peoples R China
15.Guangxi Univ, Sch Phys Sci & Technol, Nanning 530004, Guangxi, Peoples R China
16.Hebei Normal Univ, Shijiazhuang 050024, Hebei, Peoples R China
17.Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Henan, Peoples R China
18.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210023, Jiangsu, Peoples R China
19.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210023, Jiangsu, Peoples R China
20.Shandong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Shandong, Peoples R China
21.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China
22.Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China
23.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
24.Southwest Jiaotong Univ, Sch Phys Sci & Technol, Chengdu 610031, Sichuan, Peoples R China
25.Southwest Jiaotong Univ, Sch Informat Sci & Technol, Chengdu 610031, Sichuan, Peoples R China
26.Sichuan Univ, Coll Phys, Chengdu 610065, Sichuan, Peoples R China
27.Tibet Univ, Minist Educ, Key Lab Cosm Rays, Lhasa 850000, Tibet, Peoples R China
28.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China
29.Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China
30.Chinese Acad Sci, Yunnan Observ, Kunming 650216, Yunnan, Peoples R China
31.Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland
32.Max Planck Inst Nucl Phys, POB 103980, D-69029 Heidelberg, Germany
33.Univ Napoli Federico II, Dipartimento Fis, Complesso Univ Monte St Angelo, Via Cinthia, I-80126 Naples, Italy
34.Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia
35.Moscow Inst Phys & Technol, Moscow 141700, Russia
36.Univ Geneva, Fac Sci, Dept Phys Nucl & Corpusculaire, 24 Quai Ernest Ansermet, CH-1211 Geneva, Switzerland
37.Mahidol Univ, Fac Sci, Dept Phys, Bangkok 10400, Thailand
Recommended Citation
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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