Publication:
Observation of the Crab Nebula with LHAASO-KM2A - A performance study

Issued Date

2021-02-01

Resource Type

Article

ISSN

16741137

DOI

10.1088/1674-1137/abd01b

Other identifier(s)

2-s2.0-85100824643

Rights

Mahidol University

Rights Holder(s)

SCOPUS

Bibliographic Citation

Chinese Physics C. Vol.45, No.2 (2021)

Suggested Citation

F. Aharonian, Q. An, Axikegu, L. X. Bai, Y. X. Bai, Y. W. Bao, D. Bastieri, X. J. Bi, Y. J. Bi, H. Cai, J. T. Cai, Z. Cao, J. Chang, J. F. Chang, X. C. Chang, B. M. Chen, J. Chen, L. Chen, L. Chen, L. Chen, M. J. Chen, M. L. Chen, Q. H. Chen, S. H. Chen, S. Z. Chen, T. L. Chen, X. L. Chen, Y. Chen, N. Cheng, Y. D. Cheng, S. W. Cui, X. H. Cui, Y. D. Cui, B. Z. Dai, H. L. Dai, Z. G. Dai, Danzengluobu, D. Della Volpe, B. D.Ettorre Piazzoli, X. J. Dong, J. H. Fan, Y. Z. Fan, Z. X. Fan, J. Fang, K. Fang, C. F. Feng, L. Feng, S. H. Feng, Y. L. Feng, B. Gao, C. D. Gao, Q. Gao, W. Gao, M. M. Ge, L. S. Geng, G. H. Gong, Q. B. Gou, M. H. Gu, J. G. Guo, X. L. Guo, Y. Q. Guo, Y. Y. Guo, Y. A. Han, H. H. He, H. N. He, J. C. He, S. L. He, X. B. He, Y. He, M. Heller, Y. K. Hor, C. Hou, X. Hou, H. B. Hu, S. Hu, S. C. Hu, X. J. Hu, D. H. Huang, Q. L. Huang, W. H. Huang, X. T. Huang, Z. C. Huang, F. Ji, X. L. Ji, H. Y. Jia, K. Jiang, Z. J. Jiang, C. Jin, D. Kuleshov, K. Levochkin, B. B. Li, C. Li, C. Li, F. Li, H. B. Li, H. C. Li, H. Y. Li, J. Li, K. Li, W. L. Li Observation of the Crab Nebula with LHAASO-KM2A - A performance study. Chinese Physics C. Vol.45, No.2 (2021). doi:10.1088/1674-1137/abd01b Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/79005

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Thesis

Title

Observation of the Crab Nebula with LHAASO-KM2A - A performance study

Author(s)

F. Aharonian
 Q. An
 Axikegu
 L. X. Bai
 Y. X. Bai
 Y. W. Bao
 D. Bastieri
 X. J. Bi
 Y. J. Bi
 H. Cai
 J. T. Cai
 Z. Cao
 J. Chang
 J. F. Chang
 X. C. Chang
 B. M. Chen
 J. Chen
 L. Chen
 L. Chen
 L. Chen
 M. J. Chen
 M. L. Chen
 Q. H. Chen
 S. H. Chen
 S. Z. Chen
 T. L. Chen
 X. L. Chen
 Y. Chen
 N. Cheng
 Y. D. Cheng
 S. W. Cui
 X. H. Cui
 Y. D. Cui
 B. Z. Dai
 H. L. Dai
 Z. G. Dai
 Danzengluobu
 D. Della Volpe
 B. D.Ettorre Piazzoli
 X. J. Dong
 J. H. Fan
 Y. Z. Fan
 Z. X. Fan
 J. Fang
 K. Fang
 C. F. Feng
 L. Feng
 S. H. Feng
 Y. L. Feng
 B. Gao
 C. D. Gao
 Q. Gao
 W. Gao
 M. M. Ge
 L. S. Geng
 G. H. Gong
 Q. B. Gou
 M. H. Gu
 J. G. Guo
 X. L. Guo
 Y. Q. Guo
 Y. Y. Guo
 Y. A. Han
 H. H. He
 H. N. He
 J. C. He
 S. L. He
 X. B. He
 Y. He
 M. Heller
 Y. K. Hor
 C. Hou
 X. Hou
 H. B. Hu
 S. Hu
 S. C. Hu
 X. J. Hu
 D. H. Huang
 Q. L. Huang
 W. H. Huang
 X. T. Huang
 Z. C. Huang
 F. Ji
 X. L. Ji
 H. Y. Jia
 K. Jiang
 Z. J. Jiang
 C. Jin
 D. Kuleshov
 K. Levochkin
 B. B. Li
 C. Li
 C. Li
 F. Li
 H. B. Li
 H. C. Li
 H. Y. Li
 J. Li
 K. Li
 W. L. Li

Other Contributor(s)

State Key Laboratory of Particle Detection & Electronics
 Nanjing University
 Shanghai Astronomical Observatory Chinese Academy of Sciences
 Institute for Nuclear Research of the Russian Academy of Sciences
 Shandong University
 Wuhan University
 Yunnan University
 Institute of High Energy Physics Chinese Academy of Science
 University of Chinese Academy of Sciences
 Guangzhou University
 Tsinghua University
 Sun Yat-Sen University
 University of Science and Technology of China
 Zhengzhou University
 Dublin Institute for Advanced Studies
 Università degli Studi di Napoli Federico II
 Sichuan University
 National Astronomical Observatories Chinese Academy of Sciences
 Max-Planck-Institut für Kernphysik
 Southwest Jiaotong University
 Purple Mountain Observatory Chinese Academy of Sciences
 Université de Genève
 Hebei Normal University
 Tibet University
 TIANFU Cosmic Ray Research Center

Abstract

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 γ-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 γ-ray astronomy. We detect γ-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±0.05stat±0.08sys)×10-14 (E/20 TeV)-3.09±0.06stat±0.02sys cm-2 s-1 TeV-1. It is consistent with previous measurements by other experiments. This opens a new window of γ-ray astronomy above 0.1 PeV through which new ultrahigh-energy γ-ray phenomena, such as cosmic PeVatrons, might be discovered.

Keyword(s)

Physics and Astronomy

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/79005

Collections

Scopus 2021