Author(s): Aharonian F., Feinstein F., Fiasson A., Gallant Y., Jacholkowska Agnieszka, Komin Nukri, Vasileiadis G., Bazer-Bachi A.R., Boisson C., Borrel V., Chounet L.-M., Degrange B., Djannati-Ataï A., Dubus G., Espigat P., Fontaine G., Giebels B., Glicenstein J. F., Goret P., Henri G., Khélifi B., Lemière A., Lemoine-Goumard M., Martin J.M., Martineau-Huynh O., Marcowith A., de Naurois M.
(Article) Published:
Physical Review Letters, vol. 97 p.221102 (2006)
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Ref HAL: in2p3-00137679_v1
Ref Arxiv: astro-ph/0610509
DOI: 10.1103/PhysRevLett.97.221102
Ref. & Cit.: NASA ADS
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185 citations
Abstract:
The detection of gamma 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 gamma-ray emission from the GC ridge, the source is compatible with a point source with spatial extent less than 1.2[prime](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.
Comments: 5 pages, 2 figures, published in Physical Review Letters Correct some references The accepted version set on astro-ph was slightly too long for publication. This is a slightly shorter version