HESS observations of the Galactic Center Region and their possible dark matter interpretation
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Date
2006
Authors
Aharonian, F.
Akhperjanian, A.
Bazer-Bachi, A.
Beilicke, M.
Benbow, W.
Berge, D.
Bernlohr, K.
Boisson, C.
Bolz, O.
Borrel, V.
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Journal article
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Physical Review Letters, 2006; 97(22):1-5
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F. Aharonian... G. Rowell... et al. (HESS Collaboration)
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Abstract
The detection of γ rays from the source HESS J1745-290 in the Galactic Center (GC) region with the High Energy Spectroscopic System (HESS) array of Cherenkov telescopes in 2004 is presented. After subtraction of the diffuse γ-ray emission from the GC ridge, the source is compatible with a point source with spatial extent less than 1.2′(stat) (95% C.L.). The measured energy spectrum above 160 GeV is compatible with a power law with photon index of 2.25±0.04(stat)±0.10(syst) and no significant flux variation is detected. It is finally found that the bulk of the very high energy emission must have non-dark-matter origin.
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©2006 American Physical Society