Study on the Optimum Angular Radius of Windows in Searching for TeV GRBs

CHEN Xin; ZHOU Xun-Xiu; HU Hong-Bo; LIU Kun; YANG Qun-Yu; MU Jun

Chinese Physics C> 2004, Vol. 28> Issue(10) : 1094-1098

Study on the Optimum Angular Radius of Windows in Searching for TeV GRBs

Institute of High Energy Physics,CAS,Beijing 100039,China2 Department of Physics,Yunnan University,Kunming 650091,China3 Southwest Jiaotong University,Chengdu 610031,China

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Abstract：
TeV GRBs are so far only searched by EAS arrays which typically have an angular resolution at about 1°. With the limited power in identifying γ ray events from proton background events,a search window in the size of angular resolution is often chosen in many experiments. In attempting to optimize the average search sensitivity,an analytic method to determine the window size is proposed and verified by Monte Carlo method in various conditions,including different signal,background intensities and different significance calculation methods. Finally,at the situation of low statistics,an empirical significance calculation formula seems to be possible.

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CHEN Xin, ZHOU Xun-Xiu, HU Hong-Bo, LIU Kun, YANG Qun-Yu and MU Jun. Study on the Optimum Angular Radius of Windows in Searching for TeV GRBs[J]. Chinese Physics C, 2004, 28(10): 1094-1098.

CHEN Xin, ZHOU Xun-Xiu, HU Hong-Bo, LIU Kun, YANG Qun-Yu and MU Jun. Study on the Optimum Angular Radius of Windows in Searching for TeV GRBs[J]. Chinese Physics C, 2004, 28(10): 1094-1098. shu

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Received: 2003-12-30
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

Study on the Optimum Angular Radius of Windows in Searching for TeV GRBs

Corresponding author: CHEN Xin,

Institute of High Energy Physics,CAS,Beijing 100039,China2 Department of Physics,Yunnan University,Kunming 650091,China3 Southwest Jiaotong University,Chengdu 610031,China

Received Date: 2003-12-30

Accepted Date: 1900-01-01

Available Online: 2004-10-05

Abstract: TeV GRBs are so far only searched by EAS arrays which typically have an angular resolution at about 1°. With the limited power in identifying γ ray events from proton background events,a search window in the size of angular resolution is often chosen in many experiments. In attempting to optimize the average search sensitivity,an analytic method to determine the window size is proposed and verified by Monte Carlo method in various conditions,including different signal,background intensities and different significance calculation methods. Finally,at the situation of low statistics,an empirical significance calculation formula seems to be possible.

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Study on the Optimum Angular Radius of Windows in Searching for TeV GRBs

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