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arXiv 0705.3119astro-ph
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用MAGIC望远镜发现来自IC443的VHE γ辐射

Discovery of VHE Gamma Radiation from IC443 with the MAGIC Telescope

MAGIC Collaboration

摘要:

本文报道了在银河面附近探测到一个新的甚高能(VHE,E_gamma ≥ 100 GeV)γ射线源MAGIC J 0616 +225,它与SNR IC 443在空间上是一致的。这些观测是在2005年12月至2006年1月和2006年12月至2007年1月期间用MAGIC望远镜进行的。在这里,我们提出了来自这个来源的结果,导致VHE伽马射线信号在2006/7数据中具有5.7 sigma的统计显著性,并且测得的差分伽马射线通量符合幂律,描述为dN_gamma/(dA dt dE)=(1.0 +/- 0.2)*10^(-11)(E/0.4 TeV)^(-3.1 +/- 0.3)cm^(-2)s^(-1)TeV^(-1)。我们简要地讨论了所使用的观测技术和实施的数据分析的程序。结果被放在多波长发射的角度和在IC 443区域发现的分子环境。

英文摘要:

We report the detection of a new source of very high energy (VHE, E_gamma >= 100GeV) gamma-ray emission located close to the Galactic Plane, MAGIC J0616+225, which is spatially coincident with SNR IC443. The observations were carried out with the MAGIC telescope in the periods December 2005 - January 2006 and December 2006 - January 2007. Here we present results from this source, leading to a VHE gamma-ray signal with a statistical significance of 5.7 sigma in the 2006/7 data and a measured differential gamma-ray flux consistent with a power law, described as dN_gamma/(dA dt dE) = (1.0 +/- 0.2)*10^(-11)(E/0.4 TeV)^(-3.1 +/- 0.3) cm^(-2)s^(-1)TeV^(-1). We briefly discuss the observational technique used and the procedure implemented for the data analysis. The results are put in the perspective of the multiwavelength emission and the molecular environment found in the region of IC443.

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