寻找BATSEγ暴的TeV能区伴随γ暴  

Searching for TeV Counterparts to BATSE GRBs

作　　者：周勋秀[1] 贾焕玉[1] 黄庆[1] 焦善庆[1] 

机构地区：[1]西南交通大学理学院,四川成都610031

出　　处：《原子核物理评论》2005年第3期251-253,共3页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(19635010);西南交通大学基础科学研究基金资助项目~~

摘　　要：利用西藏ASγ实验三期阵列的重建数据,对25个BATSEγ暴的TeV能区伴随γ暴进行了符合寻找。在BATSEγ暴方向的90%误差范围内,找出在给定的小天区和时间间隔内出现的显著性较高的TeV事例团,并采用“等天顶角方法”来估计背景。发现少量事例团对背景有明显超出,考虑试验次数后,其超出还不足以认定为γ暴。通过MonteCarlo模拟给出了95%置信水平下流强上限的估计值为7.1×10-9photons/(cm2·s)。Searching for TeV burst-like events coincident with the BATSE GRBs data was made by using the ASγ （Tibet-Ⅲ） data. In the period we analysed, there were 25 BATSE GRBs in the field view of Tibet. A search region was defined by the BATSE 90% confidence level positioning error. A GRB candidate was chosen as a shower cluster appearing in a given small sky window and a given time interval. An equi-zenith-angle method was used to estimate the background. No significant TeV GRBs were detected. The flux upper limit at the 95% confidence level was estimated to be about 7.1×10^-9 γ（cm^2·s） by Monte Carlo simulation.

关 键 词：宇宙射线 Γ射线暴 TEV能区 

分 类 号：O572.1[理学—粒子物理与原子核物理]