TEV GAMMA-RAY OBSERVATIONS OF THE GALACTIC CENTER RIDGE BY VERITAS
TEV GAMMA-RAY OBSERVATIONS OF THE GALACTIC CENTER RIDGE BY VERITAS
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DOI：
10.3847/0004-637x/821/2/129
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发表时间：
2016-04-20
影响因子：
4.9
通讯作者：
Yusef-Zadeh, F.
中科院分区：
文献类型：
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作者：
Archer, A.;Benbow, W.;Yusef-Zadeh, F.
银河系中心脊在过去已经被GeV和TeV的伽马射线仪器广泛观测，揭示了丰富的结构，包括弥散成分和点源G0.9+0.1（复合超新星遗迹）和Sgr A*（被认为与位于银河系中心的超大质量黑洞有关）。H.E.S.S.以前的甚高能量（VHE）伽马射线观测。实验还发现了一个扩展的TeV伽马射线成分沿着银河平面在>300 GeV的伽马射线制度。在这里，我们报告了2010年至2014年VERITAS望远镜阵列在>2 TeV能量范围内对银河系中心脊的观测。根据这些观测结果，我们（1）提供了在>2 TeV伽马射线区域中Sgr A* 的微分能谱的改进测量，（2）提供了从复合SNR G0.9+0.1中检测>2 TeV伽马射线发射的方法，并改进了其多TeV伽马射线能谱的测定。(3)报告VER J1746-289的检测，一个局部增强的>2 TeV的伽马射线发射沿着银河平面。
The Galactic Center ridge has been observed extensively in the past by both GeV and TeV gamma-ray instruments revealing a wealth of structure, including a diffuse component and the point sources G0.9+0.1 (a composite supernova remnant) and Sgr A* (believed to be associated with the supermassive black hole located at the center of our Galaxy). Previous very high energy (VHE) gamma-ray observations with the H.E.S.S.. experiment have also detected an extended TeV gamma-ray component along the Galactic plane in the >300 GeV gamma-ray regime. Here we report on observations of the Galactic Center ridge from 2010 to 2014 by the VERITAS telescope array in the >2 TeV energy range. From these observations we (1) provide improved measurements of the differential energy spectrum for Sgr A* in the >2 TeV gamma-ray regime, (2) provide a detection in the >2 TeV gamma-ray emission from the composite SNR G0.9+0.1 and an improved determination of its multi-TeV gamma-ray energy spectrum, and. (3) report on the detection of VER J1746-289, a localized enhancement of >2 TeV gamma-ray emission along the Galactic plane.