Performance of LHAASO-WCDA and observation of the Crab Nebula as a standard candle Supported by the following grants: the National Key R&D program of China (2018YFA0404201, 2018YFA0404202, 2018YFA0404203), the National Natural Science Foundation of China (12022502, 11905227, U1931112, 11635011, 11761141001, Y811A35, 11675187, U1831208, U1931111) and in Thailand by RTA6280002 from Thailand Science Research and Innovation,Chinese Physics C

当前位置： X-MOL 学术 › Chin. Phys. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Performance of LHAASO-WCDA and observation of the Crab Nebula as a standard candle Supported by the following grants: the National Key R&D program of China (2018YFA0404201, 2018YFA0404202, 2018YFA0404203), the National Natural Science Foundation of China (12022502, 11905227, U1931112, 11635011, 11761141001, Y811A35, 11675187, U1831208, U1931111) and in Thailand by RTA6280002 from Thailand Science Research and Innovation
Chinese Physics C ( IF 3.6 ) Pub Date : 2021-07-27 , DOI: 10.1088/1674-1137/ac041b
F. Aharonian _{1,

2} , Q. An _{3,

4} , Axikegu ₅ , L.X. Bai ₆ , Y.X. Bai _{7,

8} , Y.W. Bao ₉ , D. Bastieri ₁₀ , X.J. Bi _{7,

8,

11} , Y.J. Bi _{7,

8} , H. Cai ₁₂ , J.T. Cai ₁₀ , Z. Cao _{7,

8,

11} , Z. Cao _{3,

4} , J. Chang ₁₃ , J.F. Chang _{3,

7,

8} , X.C. Chang _{7,

8} , B.M. Chen ₁₄ , J. Chen ₆ , L. Chen _{7,

8,

11} , L. Chen ₁₅ , L. Chen ₅ , M.J. Chen _{7,

8} , M.L. Chen _{3,

7,

8} , Q.H. Chen ₅ , S.H. Chen _{7,

8,

11} , S.Z. Chen _{7,

8} , T.L. Chen ₁₆ , X.L. Chen _{7,

8,

11} , Y. Chen ₉ , N. Cheng _{7,

8} , Y.D. Cheng _{7,

8} , S.W. Cui ₁₄ , X.H. Cui ₁₇ , Y.D. Cui ₁₈ , B.Z. Dai ₁₉ , H.L. Dai _{3,

7,

8} , Z.G. Dai ₉ , Danzengluobu ₁₆ , D. della Volpe ₂₀ , B. D'Ettorre Piazzoli ₂₁ , X.J. Dong _{7,

8} , J.H. Fan ₁₀ , Y.Z. Fan ₁₃ , Z.X. Fan _{7,

8} , J. Fang ₁₉ , K. Fang _{7,

8} , C.F. Feng ₂₂ , L. Feng ₁₃ , S.H. Feng _{7,

8} , Y.L. Feng ₁₃ , B. Gao _{7,

8} , C.D. Gao ₂₂ , Q. Gao ₁₆ , W. Gao ₂₂ , M.M. Ge ₁₉ , L.S. Geng _{7,

8} , G.H. Gong ₂₃ , Q.B. Gou _{7,

8} , M.H. Gu _{3,

7,

8} , J.G. Guo _{7,

8,

11} , X.L. Guo ₅ , Y.Q. Guo _{7,

8} , Y.Y. Guo _{7,

8,

11,

13} , Y.A. Han ₂₄ , H.H. He _{7,

8,

11} , H.N. He ₁₃ , J.C. He _{7,

8,

11} , S.L. He ₁₀ , X.B. He ₁₈ , Y. He ₅ , M. Heller ₂₀ , Y.K. Hor ₁₈ , C. Hou _{7,

8} , X. Hou ₂₅ , H.B. Hu _{7,

8,

11} , S. Hu ₆ , S.C. Hu _{7,

8,

11} , X.J. Hu ₂₃ , D.H. Huang ₅ , Q.L. Huang _{7,

8} , W.H. Huang ₂₂ , X.T. Huang ₂₂ , Z.C. Huang ₅ , F. Ji _{7,

8} , X.L. Ji _{3,

7,

8} , H.Y. Jia ₅ , K. Jiang _{3,

4} , Z.J. Jiang ₁₉ , C. Jin _{7,

8,

11} , D. Kuleshov ₂₆ , K. Levochkin ₂₆ , B.B. Li ₁₄ , C. Li _{7,

8} , C. Li _{3,

4} , F. Li _{3,

7,

8} , H.B. Li _{7,

8} , H.C. Li _{7,

8} , H.Y. Li _{4,

13} , J. Li _{3,

7,

8} , K. Li _{7,

8} , W.L. Li ₂₂ , X. Li _{3,

4} , X. Li ₅ , X.R. Li _{7,

8} , Y. Li ₆ , Y.Z. Li _{7,

8,

11} , Z. Li _{7,

8} , Z. Li ₂₇ , E.W. Liang ₂₈ , Y.F. Liang ₂₈ , S.J. Lin ₁₈ , B. Liu ₄ , C. Liu _{7,

8} , D. Liu ₂₂ , H. Liu ₅ , H.D. Liu ₂₄ , J. Liu _{7,

8} , J.L. Liu ₂₉ , J.S. Liu ₁₈ , J.Y. Liu _{7,

8} , M.Y. Liu ₁₆ , R.Y. Liu ₉ , S.M. Liu ₁₃ , W. Liu _{7,

8} , Y.N. Liu ₂₃ , Z.X. Liu ₆ , W.J. Long ₅ , R. Lu ₁₉ , H.K. Lv _{7,

8} , B.Q. Ma ₂₇ , L.L. Ma _{7,

8} , X.H. Ma _{7,

8} , J.R. Mao ₂₅ , A. Masood ₅ , W. Mitthumsiri ₃₀ , T. Montaruli ₂₀ , Y.C. Nan ₂₂ , B.Y. Pang ₅ , P. Pattarakijwanich ₃₀ , Z.Y. Pei ₁₀ , M.Y. Qi _{7,

8} , B.Q. Qiao ₇ , D. Ruffolo ₃₀ , V. Rulev ₂₆ , A. Siz ₃₀ , L. Shao ₁₄ , O. Shchegolev _{26,

31} , X.D. Sheng _{7,

8} , J.R. Shi _{7,

8} , H.C. Song ₂₇ , Yu.V. Stenkin _{26,

31} , V. Stepanov ₂₆ , Q.N. Sun ₅ , X.N. Sun ₂₈ , Z.B. Sun ₃₂ , P.H.T. Tam ₁₈ , Z.B. Tang _{3,

4} , W.W. Tian _{11,

17} , B.D. Wang _{7,

8} , C. Wang ₃₂ , H. Wang ₅ , H.G. Wang ₁₀ , J.C. Wang ₂₅ , J.S. Wang ₂₉ , L.P. Wang ₂₂ , L.Y. Wang _{7,

8} , R.N. Wang ₅ , W. Wang ₁₈ , W. Wang ₁₂ , X.G. Wang ₂₈ , X.J. Wang _{7,

8} , X.Y. Wang ₉ , Y.D. Wang _{7,

8} , Y.J. Wang _{7,

8} , Y.P. Wang _{7,

8,

11} , Z. Wang _{3,

7,

8} , Z. Wang ₂₉ , Z.H. Wang ₆ , Z.X. Wang ₁₉ , D.M. Wei ₁₃ , J.J. Wei ₁₃ , Y.J. Wei _{7,

8,

11} , T. Wen ₁₉ , C.Y. Wu _{7,

8} , H.R. Wu _{7,

8} , S. Wu _{7,

8} , W.X. Wu ₅ , X.F. Wu ₁₃ , S.Q. Xi ₅ , J. Xia _{4,

13} , J.J. Xia ₅ , G.M. Xiang _{11,

15} , G. Xiao _{7,

8} , H.B. Xiao ₁₀ , G.G. Xin ₁₂ , Y.L. Xin ₅ , Y. Xing ₁₅ , D.L. Xu ₂₉ , R.X. Xu ₂₇ , L. Xue ₂₂ , D.H. Yan ₂₅ , C.W. Yang ₆ , F.F. Yang _{3,

7,

8} , J.Y. Yang ₁₈ , L.L. Yang ₁₈ , M.J. Yang _{7,

8} , R.Z. Yang ₄ , S.B. Yang ₁₉ , Y.H. Yao ₆ , Z.G. Yao _{7,

8} , Y.M. Ye ₂₃ , L.Q. Yin _{7,

8} , N. Yin ₂₂ , X.H. You _{7,

8} , Z.Y. You _{7,

8,

11} , Y.H. Yu ₂₂ , Q. Yuan ₁₃ , H.D. Zeng ₁₃ , T.X. Zeng _{3,

7,

8} , W. Zeng ₁₉ , Z.K. Zeng _{7,

8,

11} , M. Zha _{7,

8} , X.X. Zhai _{7,

8} , B.B. Zhang ₉ , H.M. Zhang ₉ , H.Y. Zhang ₂₂ , J.L. Zhang ₁₇ , J.W. Zhang ₆ , L. Zhang ₁₉ , L. Zhang ₁₄ , L.X. Zhang ₁₀ , P.F. Zhang ₁₉ , P.P. Zhang ₁₄ , R. Zhang _{4,

13} , S.R. Zhang ₁₄ , S.S. Zhang _{7,

8} , X. Zhang ₉ , X.P. Zhang _{7,

8} , Y. Zhang _{7,

13} , Y. Zhang _{7,

8} , Y.F. Zhang ₅ , Y.L. Zhang _{7,

8} , B. Zhao ₅ , J. Zhao _{7,

8} , L. Zhao _{3,

4} , L.Z. Zhao ₁₄ , S.P. Zhao _{13,

22} , F. Zheng ₃₂ , Y. Zheng ₅ , B. Zhou _{7,

8} , H. Zhou ₂₉ , J.N. Zhou ₁₅ , P. Zhou ₉ , R. Zhou ₆ , X.X. Zhou ₅ , C.G. Zhu ₂₂ , F.R. Zhu ₅ , H. Zhu ₁₇ , K.J. Zhu _{3,

7,

8,

11} , X. Zuo _{7,

8}

Affiliation

Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2 Dublin, Ireland
Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, Heidelberg 69029, Germany
State Key Laboratory of Particle Detection and Electronics, China
University of Science and Technology of China, Hefei 230026, China
School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China
College of Physics, Sichuan University, Chengdu 610065, China
Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China
School of Astronomy and Space Science, Nanjing University, Nanjing 210023, China
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China
University of Chinese Academy of Sciences, Beijing 100049, China
School of Physics and Technology, Wuhan University, Wuhan 430072, China
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, China
Hebei Normal University, Shijiazhuang 050024, China
Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, Lhasa 850000, China
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, Zhuhai 519082, China
School of Physics and Astronomy, Yunnan University, Kunming 650091, China
Dpartement de Physique Nuclaire et Corpusculaire, Facult de Sciences, Universit de Genve, 24 Quai Ernest Ansermet, Geneva 1211, Switzerland
Dipartimento di Fisica dell’Universit di Napoli “Federico II”, Complesso Universitario di Monte Sant’Angelo, via Cinthia, Napoli 80126, Italy
Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, China
Department of Engineering Physics, Tsinghua University, Beijing 100084, China
School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China
Institute for Nuclear Research of Russian Academy of Sciences, Moscow 117312, Russia
School of Physics, Peking University, Beijing 100871, China
School of Physical Science and Technology, Guangxi University, Nanning 530004, China
Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
Department of Physics, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
Moscow Institute of Physics and Technology, Moscow 141700, Russia
National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China

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 at 1 TeV and better than 0.2 above 6 TeV, with a pointing accuracy better than 0.05. 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.

中文翻译：

LHAASO-WCDA 的性能和蟹状星云作为标准烛光的观测得到以下资助：国家重点研发计划（2018YFA0404201，2018YFA0404202，2018YFA0404203），国家自然科学基金（12591211212012012012012） 11635011, 11761141001, Y811A35, 11675187, U1831208, U1931111) 和在泰国由来自泰国科学研究与创新的 RTA6280002

LHAASO 实验的首个水切伦科夫探测器（WCDA-1）自 2019 年 4 月开始运行。通过观察蟹状星云作为标准烛光，分析了第一年的数据以测试其性能。WCDA-1 的灵敏度为每年 65 mCU，统计阈值为 5 $\西格玛$ . 为了实现这一点，在应用一种算法来分离伽马诱发的淋浴后，在 1 TeV 附近达到 97.7% 的宇宙射线背景抑制率，在 6 TeV 附近达到 99.8%，光子接受率约为 50%。使用蟹状星云作为点源测量的角分辨率在 1 TeV 时约为 0.45，在 6 TeV 时优于 0.2，指向精度优于 0.05。这些值都符合设计规范。发现 6 TeV 左右的伽马射线的能量分辨率为 33%。蟹状星云在 500 GeV 到 15.8 TeV 范围内的光谱能量分布被测量，发现与其他 TeV 伽马射线天文台的结果一致。

更新日期：2021-07-27

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南

全部期刊列表>>