Study on the Sensitivity in Detecting Crab Nebula by ARGO-YBJ Experiment

CUI Shu-Wang; HU Hong-Bo; WANG Huan-Yu; LU Hong; TAN Yong-Heng

Chinese Physics C> 2005, Vol. 29> Issue(1) : 62-67

Study on the Sensitivity in Detecting Crab Nebula by ARGO-YBJ Experiment

Institute of High Energy Physics,CAS,Beijing 100049,China2 Physics Department,Hebei Normal University,Shijiazhuang 050016,China

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A“full coverage”air shower array,ARGO (Astrophysical Radiation with Groundbased Observatory) experiment is under construction currently at YangBaJing in Tibet,China.Its altitude of 4,300m above see level is equivalent to an atmospheric depth of 606g/cm².ARGO experiment makes use of a full–coverage detector consisting of a layer of single gap Resistive Plate Chambers (RPC).The phase Ⅰ detector, including a central (74×78m²) part and a guard ring in size of 6400m²,will be operated in 2005. one of the main goals of ARGO is to detect VHE gamma ray emission from galactic and extragalactic sources. With full Monte-Carlo simulation we studied the detector's angular resolution and found that the angular resolution strongly depends on the number of fired pads n_pads.With three statistical methods we estimated ARGO's sensitivity in detecting Crab Nebula.According to our simulation, in one year's operation,Crab Nebula will be detected by ARGO with a statistical significance of about 18 standard deviation without appeying any gamma/hadron identification technique.

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CUI Shu-Wang, HU Hong-Bo, WANG Huan-Yu, LU Hong and TAN Yong-Heng. Study on the Sensitivity in Detecting Crab Nebula by ARGO-YBJ Experiment[J]. Chinese Physics C, 2005, 29(1): 62-67.

CUI Shu-Wang, HU Hong-Bo, WANG Huan-Yu, LU Hong and TAN Yong-Heng. Study on the Sensitivity in Detecting Crab Nebula by ARGO-YBJ Experiment[J]. Chinese Physics C, 2005, 29(1): 62-67. shu

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Received: 2004-04-21
Revised: 1900-01-01

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通讯作者: 陈斌, [email protected]

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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 Sensitivity in Detecting Crab Nebula by ARGO-YBJ Experiment

Corresponding author: CUI Shu-Wang,

Institute of High Energy Physics,CAS,Beijing 100049,China2 Physics Department,Hebei Normal University,Shijiazhuang 050016,China

Received Date: 2004-04-21

Accepted Date: 1900-01-01

Available Online: 2005-01-05

Abstract: A“full coverage”air shower array,ARGO (Astrophysical Radiation with Groundbased Observatory) experiment is under construction currently at YangBaJing in Tibet,China.Its altitude of 4,300m above see level is equivalent to an atmospheric depth of 606g/cm².ARGO experiment makes use of a full–coverage detector consisting of a layer of single gap Resistive Plate Chambers (RPC).The phase Ⅰ detector, including a central (74×78m²) part and a guard ring in size of 6400m²,will be operated in 2005. one of the main goals of ARGO is to detect VHE gamma ray emission from galactic and extragalactic sources. With full Monte-Carlo simulation we studied the detector's angular resolution and found that the angular resolution strongly depends on the number of fired pads n_pads.With three statistical methods we estimated ARGO's sensitivity in detecting Crab Nebula.According to our simulation, in one year's operation,Crab Nebula will be detected by ARGO with a statistical significance of about 18 standard deviation without appeying any gamma/hadron identification technique.

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