Search for TeV Gamma Rays from the Crab Nebula with Tibet Ⅱ/HD AS Array

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XU XianWu, DING LinKai, CAO PeiYuan, DAI BenZhong, FENG ZhenYong, FU Yu, GUO HongWei, HE Mao, HUANG Qing, HUO AnXiang, JIA HuanYu, LI JinYu, LIU ShaoMin, Search for TeV Gamma Rays from the Crab Nebula with Tibet Ⅱ/HD AS Array[J]. Chinese Physics C, 2000, 24(6): 473-477.
XU XianWu, DING LinKai, CAO PeiYuan, DAI BenZhong, FENG ZhenYong, FU Yu, GUO HongWei, HE Mao, HUANG Qing, HUO AnXiang, JIA HuanYu, LI JinYu, LIU ShaoMin, Search for TeV Gamma Rays from the Crab Nebula with Tibet Ⅱ/HD AS Array[J]. Chinese Physics C, 2000, 24(6): 473-477. shu
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Received: 1999-08-12
Revised: 1900-01-01
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Search for TeV Gamma Rays from the Crab Nebula with Tibet Ⅱ/HD AS Array

    Corresponding author: XU XianWu,
  • The Key Lab.of Cosmic Ray and High Energy Astrophysics, Institute of High Energy Physics,CAS, Beijing 100039,China2 Department of Physics,Shangdong University,Ji'nan 250100,China3 Department of Physics,Yunnan University,Kunming 650091,China4 Department of Physics,South West Jiaotong University,Chengdu 610031,China5 Department of Mathematics and Physics,Tibet University,Lhasa 850000,China

Abstract: A lot of data has been accumulated with Tibet Ⅱand HD AS array operated successfully since October of 1995 and 1996,respectivley. The preliminary results of searching for steady TeV gamma ray emissions from Crab Nebula with these data were presented in this paper. Analysis shows that the accumulative excess events of steady 3TeV gamma ray emissions from Crab Nebula was increasing stably and the statistical significance reached 3.2σ, whereas no statistical significant evidence of steady 10TeV and 30TeV gamma ray emissions was found.

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