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Sensitivity study of(10,100) GeV gamma-ray bursts with double shower front events from ARGO-YBJ 下载免费PDF全文
Xun-Xiu Zhou Lan-Lan Gao Yu Zhang Yi-Qing Guo Qing-Qi Zhu Huan-Yu Jia Dai-Hui Huang 《中国物理C(英文版)》2016,40(7):075001-075001
ARGO-YBJ, located at the Yangbajing Cosmic Ray Observatory(4300 m a.s.l., Tibet, China), is a full coverage air shower array, with an energy threshold of ~300 Ge V for gamma-ray astronomy. Most of the recorded events are single front showers, satisfying the trigger requirement of at least 20 particles detected in a given time window. However, in ~11.5% of the events, two randomly arriving showers may be recorded in the same time window,and the second one, generally smaller, does not need to satisfy the trigger condition. These events are called double shower front events. By using these small showers, well under the trigger threshold, the detector primary energy threshold can be lowered to a few tens of Ge V. In this paper, the angular resolution that can be achieved with these events is evaluated by a full Monte Carlo simulation. The ARGO-YBJ sensitivity in detecting gamma-ray bursts(GRBs) by using double shower front events is also studied for various cutoff energies, time durations, and zenith angles of GRBs in ARGO's field of view. 相似文献
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西藏宇宙线实验的回顾与展望 总被引:1,自引:0,他引:1
文章简要回顾我国宇宙线物理研究的历史,重点介绍了在西藏开展宇宙线实验的发展历程及取得的重要成果,如中日合作甘巴拉山乳胶室实验、中日合作羊八井ASγ实验及中意合作羊八井AR-GO-YBJ实验,并对在西藏开展高海拔宇宙线实验的前景进行了展望。 相似文献
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The energy spectrum of cosmic Hydrogen and Helium nuclei has been measured below the so-called "knee" by using a hybrid experiment with a wide field-of-view Cherenkov telescope and the Resistive Plate Chamber(RPC) array of the ARGO-YBJ experiment at 4300 m above sea level. The Hydrogen and Helium nuclei have been well separated from other cosmic ray components by using a multi-parameter technique. A highly uniform energy resolution of about 25% is achieved throughout the whole energy range(100–700 TeV). The observed energy spectrum is compatible with a single power law with index γ =-2.63±0.06. 相似文献
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