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arXiv 0801.0031astro-ph
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用CANGAROO- III观察到MSH 15-52的扩展VHE gamma-ray发射

Observation of an extended VHE gamma-ray emission from MSH 15-52 with CANGAROO-III

T. Nakamori, H. kubo, T. Yoshida, T. Tanimori, R. Enomoto

摘要:

2006年4月至6月,我们利用CANGAROO-III成像大气切伦科夫望远镜阵列观测了超新星遗迹MSH 15-52(G320.4-1.2),其中包含伽马射线脉冲星PSR B1509-58。我们在48.4小时的总有效曝光期间检测到7sigma水平的810 GeV以上的伽马射线。我们获得了2.35 TeV的微分伽马射线通量(7.9+/-1.5_{stat}+/-1.7_{sys})\times 10^{-13} cm^{-2}s^{-1}TeV^{-1},光子指数为2.21+/-0.39_{stat}+/-0.40_{sys},这与H.E.S. S的结果一致。2004年的观察。与我们的点扩散函数相比,形态显示出扩展发射。我们认为合理的起源的高能量发射的基础上的多波长光谱分析和能量参数。

英文摘要:

We have observed the supernova remnant MSH 15-52 (G320.4-1.2), which contains the gamma-ray pulsar PSR B1509-58, using the CANGAROO-III imaging atmospheric Cherenkov telescope array from April to June in 2006. We detected gamma rays above 810 GeV at the 7 sigma level during a total effective exposure of 48.4 hours. We obtained a differential gamma-ray flux at 2.35 TeV of (7.9+/-1.5_{stat}+/-1.7_{sys}) \times 10^{-13} cm^{-2}s^{-1}TeV^{-1} with a photon index of 2.21+/-0.39_{stat}+/-0.40_{sys}, which is compatible with that of the H.E.S.S. observation in 2004. The morphology shows extended emission compared to our Point Spread Function. We consider the plausible origin of the high energy emission based on a multi-wavelength spectral analysis and energetics arguments.

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