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

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

Chinese Physics C> 2000, Vol. 24> Issue(6) : 473-477

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

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

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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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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.

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Received: 1999-08-12
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 1999-08-12

Accepted Date: 1900-01-01

Available Online: 2000-06-05

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

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