观测来自银道面的TeVγ射线  

Observations of TeV Gamma Ray from the Galactic Plane

作　　者：徐春娴[1] 张勇[1] 何会林[1] 何会海[1] 陈永中[1] 姜印琳[1] 

机构地区：[1]中国科学院高能物理研究所宇宙线和高能天体物理开放实验室,北京100039

出　　处：《高能物理与核物理》2001年第9期799-806,共8页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金资助 (1 95 75 0 4 7;1 9875 0 5 8)~~

摘　　要：给出来自银经 79.3 866°的银道面的TeVγ射线的观测结果 .数据是在1 995年 1 0月至 1 998年 1 1月间的晴朗无月夜 ,用兴隆站的大气契伦科夫望远镜ACT2和ACT3以向源 -背景 (ON -OFF)观测方式取得的 ,总观测时间为 2 2 4 .4h .在望远镜计数服从高斯分布的情况下 ,导出了最大似然比λ的表达式 ,它直接给出显著性水平的概率 .用它分析观测资料 。We present here the result of observation of TeV gamma ray emission from the galactic plane at a galactic longitude of 79.3866 deg. With Atmospheric Cherenkov Telescopes (ACT2 and ACT3) located at Xinglong station. The data was taken between Oct. 1995 and Nov. 1998 over a total time of 224.4h in the standard ON-OFF mode. Assuming the data obey Gaussian distribution, a formula of the maximum likelihood ratio λ was derived that gives the probability of significance level directly. Using the formula, we analysed the data and found that there is no evidence for TeV gamma ray emission from the galactic plane within statistic error.

关 键 词：TeVγ射线 银道面 假设检验 宇宙线 跟踪望远镜 跟踪观测 

分 类 号：P172.4[天文地球—天文学]