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arXiv 0906.5574astro-ph.HEastro-ph.GA
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用H.E.S.S探测PSR B1706-44附近的甚高能gamma-ray发射

Detection of very-high-energy gamma-ray emission from the vicinity of PSR B1706-44 with H.E.S.S

S. Hoppe, E. de Oña-Wilhemi, B. Khélifi, R. C. G. Chaves, O. C. de Jager, C. Stegmann, R. Terrier

摘要:

高能脉冲星PSR B1706-44和邻近的超新星遗迹(SNR)候选者G 343.1-2.3被H.E.S.S.观测到。在2007年的一次专门的观察活动中。发现了一个新的甚高能(VHE; E > 100 GeV)γ射线源HESS J1708-443,其质心位于RA(J2000)= 17 h 08 m10 s和Dec(J2000)=-44d21 ',每个轴上的统计误差为3 arcmin。VHE伽马射线源比H.E.S.S.点扩散函数,固有高斯宽度为0.29 +/- 0.04 deg。它的能谱可以用幂律来描述,光子指数Gamma = 2.0 +/- 0.1(stat)+/- 0.2(sys)。在1-10 TeV之间测得的积分通量约为蟹状星云在相同能量范围内通量的17%。讨论了与PSR B1706-44和SNR G343.1-2.3的可能关联。

英文摘要:

The energetic pulsar PSR B1706-44 and the adjacent supernova remnant (SNR) candidate G 343.1-2.3 were observed by H.E.S.S. during a dedicated observational campaign in 2007. A new source of very-high-energy (VHE; E > 100 GeV) gamma-ray emission, HESS J1708-443, was discovered with its centroid at RA(J2000) = 17h08m10s and Dec(J2000) = -44d21', with a statistical error of 3 arcmin on each axis. The VHE gamma-ray source is significantly more extended than the H.E.S.S. point-spread function, with an intrinsic Gaussian width of 0.29 +/- 0.04 deg. Its energy spectrum can be described by a power law with a photon index Gamma = 2.0 +/- 0.1 (stat) +/- 0.2 (sys). The integral flux measured between 1-10 TeV is ~17% of the Crab Nebula flux in the same energy range. The possible associations with PSR B1706-44 and SNR G343.1-2.3 are discussed.

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