用羊八井加密阵列数据寻找与BASTE实验 相符的3TeV能区的宇宙γ暴
Search for 3 TeV Gamma-Ray Bursts Coincident with the BASTE Experiment by Using the Data of Tibet HD Air Shower Array
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摘要:采用西藏羊八井加密阵列数据,对美国CGRO天文卫星上的BASTE实验在1998年3月期间所观测到的 15个宇宙γ暴进行了3TeV能区的符合寻找。这些γ暴均位于羊八井阵列的有效观测视场内。在寻找工作中采 用了组团方法,以提高观测阵列对γ暴的灵敏度。寻找结果表明,所有BASTE符合暴候选事例团的多重数分布 均在背景的统计涨落之内,没有发现存在3TeV能区BASTE符合暴的证据。这个结果支持了γ暴的宇宙学起源 模型。Abstract:A search for 3 TeV Gamma-ray bursts (GRBs) coincidentwith the BASTE experimentwas done by using the data of the Tibet HD air shower array. 15 GRBs in the 4B BASTE catalog were searched, whichwere obtained in March, 1998, and within the effective viewing sky of the Tibet HD array. The so- called cluster method was adopted in the analysis. No convincing signal was detected fromthe direction the BASTE GRBs. The result supports the cosmological model of gamma-ray bursts.
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