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HESS observations of the galactic center region and their possible dark matter interpretation |
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| Authors: | Aharonian F Akhperjanian A G Bazer-Bachi A R Beilicke M Benbow W Berge D Bernlöhr K Boisson C Bolz O Borrel V Braun I Breitling F Brown A M Bühler R Büsching I Carrigan S Chadwick P M Chounet L-M Cornils R Costamante L Degrange B Dickinson H J Djannati-Ataï A Drury L O'C Dubus G Egberts K Emmanoulopoulos D Espigat P Feinstein F Ferrero E Fiasson A Fontaine G Funk Seb Funk S Gallant Y A Giebels B Glicenstein J F Goret P Hadjichristidis C Hauser D Hauser M Heinzelmann G Henri G Hermann G Hinton J A Hofmann W Holleran M Horns D Jacholkowska A de Jager O C Khélifi B Komin Nu Konopelko A Kosack K |
| Affiliation: | Max-Planck-Institut für Kernphysik, P.O. Box 103980, D-69029 Heidelberg, Germany. |
| 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;{'}(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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