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arXiv 0907.0642astro-ph.HEastro-ph.GA
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HESS J1731-347的X-和gamma-ray研究与新发现的SNR一致

X- and gamma-ray studies of HESS J1731-347 coincident with a newly discovered SNR

F. Acero, G. Pühlhofer, D. Klochkov, Nu. Komin, Y. Gallant, D. Horns, A. Santangelo

摘要:

在H.E.S.S.进行的银河平面调查中,发现了许多VHE伽马射线源,对于它们,在其他波长处没有明确的对应物可以被识别。HESS J1731-347最初属于这个源类别。然而,最近在射电数据中发现了新的壳型超新星遗迹(SNR)G353.6-0.7,与VHE源的位置一致。我们将提出新的X射线观测,覆盖一小部分的VHE源,揭示非热发射,最有可能被解释为同步辐射从高能电子。再加上一个更大的头盔。数据集,其中包括超过两倍的观察时间使用的发现文件,使我们能够测试是否VHE源可能确实归因于壳型发射,从新的SNR。如果这是真的,这将使HESS J1731-347成为具有VHE发射的非热壳型超新星遗迹中的一个新物体。

英文摘要:

In the survey of the Galactic plane conducted with H.E.S.S., many VHE gamma-ray sources were discovered for which no clear counterpart at other wavelengths could be identified. HESS J1731-347 initially belonged to this source class. Recently however, the new shell-type supernova remnant (SNR) G353.6-0.7 was discovered in radio data, positionally coinciding with the VHE source. We will present new X-ray observations that cover a fraction of the VHE source, revealing nonthermal emission that most likely can be interpreted as synchrotron emission from high-energy electrons. This, along with a larger H.E.S.S. data set which comprises more than twice the observation time used in the discovery paper, allows us to test whether the VHE source may indeed be attributed to shell-type emission from that new SNR. If true, this would make HESS J1731-347 a new object in the small but growing class of non-thermal shell-type supernova remnants with VHE emission.

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