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Optimization of performance of the KM2A full array using the Crab Nebula

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【作者】 曹臻F.Aharonian安琪阿西克古白云翔包逸炜D.Bastieri毕效军毕玉江蔡金庭曹晴曹文羽曹喆常进常劲帆陈尚明陈恩生陈亮陈林陈龙陈明君陈玛丽陈起辉陈素弘陈天禄陈阳程宁程耀东崔明阳崔树旺崔晓红崔昱东戴本忠代洪亮戴子高单增罗布D.della Volpe董绪强段凯凯樊军辉范一中方军方堃冯存峰封莉冯少辉丰晓婷冯有亮S.Gabici高博高川东高林青高启高卫高伟康葛茂茂耿利斯G.Giacinti龚光华苟全补顾旻皓郭福来郭晓磊郭义庆郭莹莹韩毅昂何会海贺昊宁何佳银何新波何钰M.Heller贺远强侯博文侯超侯贤胡红波胡铨胡世聪黄代绘黄天奇黄文俊黄性涛黄晓渊黄勇黄志成季筱璐贾焕玉贾康江琨姜晓巍姜泽军金敏康明铭柯通D.KuleshovK.Kurinov李兵兵李澄李骢李丹李飞李海波李会财李华阳李军李剑李捷李凯李文龙李文莲李秀荣李昕李一卓李哲黎卓梁恩维梁云峰林苏杰刘冰刘成刘栋刘虎刘海东刘佳刘江来刘金艳刘茂元柳若愚刘四明刘伟刘怡刘以农鲁睿罗晴吕洪魁马伯强马玲玲马欣华毛基荣闵振W.Mitthumsiri穆慧君南云程A.Neronov区子维庞彬宇P.Pattarakijwanich裴致远齐孟尧祁业情乔冰强秦家军D.RuffoloA.SáizD.Semikoz邵澄宇邵琅O.Shchegolev盛祥东舒富文宋慧超Yu.V.StenkinV.Stepanov苏扬孙秦宁孙晓娜孙志斌谭柏轩唐庆文唐泽波田文武王超王昌贝王广威王洪光王惠惠王建成汪凯王利苹王玲玉王培汉王冉王为王祥高王祥玉王阳王玉东王岩谨王忠海王仲翔王振王铮韦大明魏俊杰魏永健文韬吴超勇吴含荣武莎吴雪峰吴雨生席邵强夏捷夏君集项光漫肖迪泫肖刚辛广广辛玉良邢祎熊峥徐东莲徐仁峰徐仁新徐伟立薛良闫大海颜景志颜田杨朝文杨帆杨冯帆杨何文杨佳盈杨莉莉杨明洁杨睿智杨深邦姚玉华姚志国叶一锰尹丽巧尹娜游晓浩游智勇于艳红袁强岳华曾厚敦曾婷轩曾玮查敏张彬彬张丰张海明张恒英张建立张丽霞张力张鹏飞张佩佩张瑞张少博张少如张寿山张潇张笑鹏张云峰张毅张勇赵兵赵静赵雷赵立志赵世平郑福周斌周浩周佳能周猛周平周荣周勋秀祝成光祝凤荣朱辉朱科军左雄LHAASO Collaboration

【Author】 Zhen Cao;F.Aharonian;Q.An;Axikegu;Y.X.Bai;Y.W.Bao;D.Bastieri;X.J.Bi;Y.J.Bi;J.T.Cai;Q.Cao;W.Y.Cao;Zhe Cao;J.Chang;J.F.Chang;A.M.Chen;E.S.Chen;Liang Chen;Lin Chen;Long Chen;M.J.Chen;M.L.Chen;Q.H.Chen;S.H.Chen;T.L.Chen;Y.Chen;N.Cheng;Y.D.Cheng;M.Y.Cui;S.W.Cui;X.H.Cui;Y.D.Cui;B.Z.Dai;H.L.Dai;Z.G.Dai;Danzengluobu;D.della Volpe;X.Q.Dong;K.K.Duan;J.H.Fan;Y.Z.Fan;J.Fang;K.Fang;C.F.Feng;L.Feng;S.H.Feng;X.T.Feng;Y.L.Feng;S.Gabici;B.Gao;C.D.Gao;L.Q.Gao;Q.Gao;W.Gao;W.K.Gao;M.M.Ge;L.S.Geng;G.Giacinti;G.H.Gong;Q.B.Gou;M.H.Gu;F.L.Guo;X.L.Guo;Y.Q.Guo;Y.Y.Guo;Y.A.Han;H.H.He;H.N.He;J.Y.He;X.B.He;Y.He;M.Heller;Y.K.Hor;B.W.Hou;C.Hou;X.Hou;H.B.Hu;Q.Hu;S.C.Hu;D.H.Huang;T.Q.Huang;W.J.Huang;X.T.Huang;X.Y.Huang;Y.Huang;Z.C.Huang;X.L.Ji;H.Y.Jia;K.Jia;K.Jiang;X.W.Jiang;Z.J.Jiang;M.Jin;M.M.Kang;T.Ke;D.Kuleshov;K.Kurinov;B.B.Li;Cheng Li;Cong Li;D.Li;F.Li;H.B.Li;H.C.Li;H.Y.Li;J.Li;Jian Li;Jie Li;K.Li;W.L.Li;W.L.Li;X.R.Li;Xin Li;Y.Z.Li;Zhe Li;Zhuo Li;E.W.Liang;Y.F.Liang;S.J.Lin;B.Liu;C.Liu;D.Liu;H.Liu;H.D.Liu;J.Liu;J.L.Liu;J.Y.Liu;M.Y.Liu;R.Y.Liu;S.M.Liu;W.Liu;Y.Liu;Y.N.Liu;R.Lu;Q.Luo;H.K.Lv;B.Q.Ma;L.L.Ma;X.H.Ma;J.R.Mao;Z.Min;W.Mitthumsiri;H.J.Mu;Y.C.Nan;A.Neronov;Z.W.Ou;B.Y.Pang;P.Pattarakijwanich;Z.Y.Pei;M.Y.Qi;Y.Q.Qi;B.Q.Qiao;J.J.Qin;D.Ruffolo;A.Sáiz;D.Semikoz;C.Y.Shao;L.Shao;O.Shchegolev;X.D.Sheng;F.W.Shu;H.C.Song;Yu.V.Stenkin;V.Stepanov;Y.Su;Q.N.Sun;X.N.Sun;Z.B.Sun;P.H.T.Tam;Q.W.Tang;Z.B.Tang;W.W.Tian;C.Wang;C.B.Wang;G.W.Wang;H.G.Wang;H.H.Wang;J.C.Wang;K.Wang;L.P.Wang;L.Y.Wang;P.H.Wang;R.Wang;W.Wang;X.G.Wang;X.Y.Wang;Y.Wang;Y.D.Wang;Y.J.Wang;Z.H.Wang;Z.X.Wang;Zhen Wang;Zheng Wang;D.M.Wei;J.J.Wei;Y.J.Wei;T.Wen;C.Y.Wu;H.R.Wu;S.Wu;X.F.Wu;Y.S.Wu;S.Q.Xi;J.Xia;J.J.Xia;G.M.Xiang;D.X.Xiao;G.Xiao;G.G.Xin;Y.L.Xin;Y.Xing;Z.Xiong;D.L.Xu;R.F.Xu;R.X.Xu;W.L.Xu;L.Xue;D.H.Yan;J.Z.Yan;T.Yan;C.W.Yang;F.Yang;F.F.Yang;H.W.Yang;J.Y.Yang;L.L.Yang;M.J.Yang;R.Z.Yang;S.B.Yang;Y.H.Yao;Z.G.Yao;Y.M.Ye;L.Q.Yin;N.Yin;X.H.You;Z.Y.You;Y.H.Yu;Q.Yuan;H.Yue;H.D.Zeng;T.X.Zeng;W.Zeng;M.Zha;B.B.Zhang;F.Zhang;H.M.Zhang;H.Y.Zhang;J.L.Zhang;L.X.Zhang;Li Zhang;P.F.Zhang;P.P.Zhang;R.Zhang;S.B.Zhang;S.R.Zhang;S.S.Zhang;X.Zhang;X.P.Zhang;Y.F.Zhang;Yi Zhang;Yong Zhang;B.Zhao;J.Zhao;L.Zhao;L.Z.Zhao;S.P.Zhao;F.Zheng;B.Zhou;H.Zhou;J.N.Zhou;M.Zhou;P.Zhou;R.Zhou;X.X.Zhou;C.G.Zhu;F.R.Zhu;H.Zhu;K.J.Zhu;X.Zuo;LHAASO Collaboration;Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center,Institute of High Energy Physics,Chinese Academy of Sciences;University of Chinese Academy of Sciences;Tianfu Cosmic Ray Research Center;Dublin Institute for Advanced Studies;Max-Planck-Institut for Nuclear Physics;State Key Laboratory of Particle Detection and Electronics;University of Science and Technology of China;School of Physical Science and Technology & School of Information Science and Technology,Southwest Jiaotong University;School of Astronomy and Space Science,Nanjing University;Center for Astrophysics,Guangzhou University;Hebei Normal University;Key Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences;Tsung-Dao Lee Institute & School of Physics and Astronomy,Shanghai Jiao Tong University;Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of Sciences;Key Laboratory of Cosmic Rays (Tibet University),Ministry of Education;National Astronomical Observatories,Chinese Academy of Sciences;School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai),Sun Yat-sen University;School of Physics and Astronomy,Yunnan University;Département de Physique Nucléaire et Corpusculaire,Facultéde Sciences,Universitéde Genève;Institute of Frontier and Interdisciplinary Science,Shandong University;APC,Universit’e Paris Cit’e,CNRS/IN2P3,CEA/IRFU,Observatoire de Paris;Department of Engineering Physics,Tsinghua University;School of Physics and Microelectronics,Zhengzhou University;Yunnan Observatories,Chinese Academy of Sciences;School of Physics and Astronomy (Zhuhai) & School of Physics(Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai),Sun Yat-sen University;College of Physics,Sichuan University;Institute for Nuclear Research of Russian Academy of Sciences;Moscow Institute of Physics and Technology;School of Physics,Peking University;School of Physical Science and Technology,Guangxi University;Department of Physics,Faculty of Science,Mahidol University;Center for Relativistic Astrophysics and High Energy Physics,School of Physics and Materials Science & Institute of Space Science and Technology,Nanchang University;National Space Science Center,Chinese Academy of Sciences;

【机构】 Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center,Institute of High Energy Physics,Chinese Academy of SciencesUniversity of Chinese Academy of SciencesTianfu Cosmic Ray Research CenterDublin Institute for Advanced StudiesMax-Planck-Institut for Nuclear PhysicsState Key Laboratory of Particle Detection and ElectronicsUniversity of Science and Technology of ChinaSchool of Physical Science and Technology & School of Information Science and Technology,Southwest Jiaotong UniversitySchool of Astronomy and Space Science,Nanjing UniversityCenter for Astrophysics,Guangzhou UniversityHebei Normal UniversityKey Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy,Purple Mountain Observatory,Chinese Academy of SciencesTsung-Dao Lee Institute & School of Physics and Astronomy,Shanghai Jiao Tong UniversityKey Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of SciencesKey Laboratory of Cosmic Rays (Tibet University),Ministry of EducationNational Astronomical Observatories,Chinese Academy of SciencesSchool of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai),Sun Yat-sen UniversitySchool of Physics and Astronomy,Yunnan UniversityDépartement de Physique Nucléaire et Corpusculaire,Facultéde Sciences,Universitéde GenèveInstitute of Frontier and Interdisciplinary Science,Shandong UniversityAPC,Universit’e Paris Cit’e,CNRS/IN2P3,CEA/IRFU,Observatoire de ParisDepartment of Engineering Physics,Tsinghua UniversitySchool of Physics and Microelectronics,Zhengzhou UniversityYunnan Observatories,Chinese Academy of SciencesSchool of Physics and Astronomy (Zhuhai) & School of Physics(Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai),Sun Yat-sen UniversityCollege of Physics,Sichuan UniversityInstitute for Nuclear Research of Russian Academy of SciencesMoscow Institute of Physics and TechnologySchool of Physics,Peking UniversitySchool of Physical Science and Technology,Guangxi UniversityDepartment of Physics,Faculty of Science,Mahidol UniversityCenter for Relativistic Astrophysics and High Energy Physics,School of Physics and Materials Science & Institute of Space Science and Technology,Nanchang UniversityNational Space Science Center,Chinese Academy of Sciences

【摘要】 The full array of the Large High Altitude Air Shower Observatory(LHAASO) has been in operation since July 2021. For its kilometer-square array(KM2A), we optimized the selection criteria for very high and ultrahigh energy γ-rays using data collected from August 2021 to August 2022, resulting in an improvement in significance of the detection in the Crab Nebula of approximately 15%, compared with that of previous cuts. With the implementation of these new selection criteria, the angular resolution was also significantly improved by approximately 10% at tens of Te V. Other aspects of the full KM2A array performance, such as the pointing error, were also calibrated using the Crab Nebula. The resulting energy spectrum of the Crab Nebula in the energy range of 10-1000Te V are well fitted by a log-parabola model, which is consistent with the previous results from LHAASO and other experiments.

【Abstract】 The full array of the Large High Altitude Air Shower Observatory(LHAASO) has been in operation since July 2021. For its kilometer-square array(KM2A), we optimized the selection criteria for very high and ultrahigh energy γ-rays using data collected from August 2021 to August 2022, resulting in an improvement in significance of the detection in the Crab Nebula of approximately 15%, compared with that of previous cuts. With the implementation of these new selection criteria, the angular resolution was also significantly improved by approximately 10% at tens of Te V. Other aspects of the full KM2A array performance, such as the pointing error, were also calibrated using the Crab Nebula. The resulting energy spectrum of the Crab Nebula in the energy range of 10-1000Te V are well fitted by a log-parabola model, which is consistent with the previous results from LHAASO and other experiments.

【关键词】 γ-rayCrab Nebulasignificance
【Key words】 γ-rayCrab Nebulasignificance
【基金】 Supported by the National Key R&D Program of China (2018YFA0404201, 2018YFA0404202, 2018YFA0404203, 2018YFA0404204);the National Natural Science Foundation of China (12022502, 12205314, 12105301, 12261160362, 12105294, U1931201);the Youth Innovation Promotion Association CAS (2022010);in Thailand by the National Science and Technology Development Agency (NSTDA);the National Research Council of Thailand (NRCT):High-Potential Research Team Grant Program (N42A650868)
  • 【文献出处】 Chinese Physics C ,中国物理C , 编辑部邮箱 ,2024年06期
  • 【分类号】P154.3;P145.3;O571.323
  • 【下载频次】5
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