%0 Journal Article %T HESS Observations of the Galactic Center Region and Their Possible Dark Matter Interpretation %+ Centre d'étude spatiale des rayonnements (CESR) %+ Laboratoire Univers et Théories (LUTH (UMR_8102)) %+ Laboratoire Leprince-Ringuet (LLR) %+ APC - Astrophysique des Hautes Energies (APC - AHE) %+ AstroParticule et Cosmologie (APC (UMR_7164)) %+ Laboratoire de Physique Théorique et Astroparticules (LPTA) %+ Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA) %+ Laboratoire d'Astrophysique de Grenoble (LAOG) %+ Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE) %A Aharonian, F. %A Akhperjanian, A. G. %A Bazer-Bachi, A.R. %A Beilicke, M. %A Benbow, W. %A Berge, D. %A Bernlöhr, K. %A Boisson, C. %A Bolz, O. %A Borrel, V. %A Braun, I. %A Breitling, F. %A Brown, A. M. %A Bühler, R. %A Büsching, I. %A Carrigan, S. %A Chadwick, P. M. %A Chounet, L.-M. %A Cornils, R. %A Costamante, L. %A Degrange, B. %A Dickinson, H. J. %A Djannati-Ataï, A. %A Drury, L. O.'C. %A Dubus, G. %A Egberts, K. %A Emmanoulopoulos, D. %A Espigat, P. %A Feinstein, F. %A Ferrero, E. %A Fiasson, A. %A Fontaine, G. %A Funk, Seb. %A Funk, S. %A Gallant, Y.A. %A Giebels, B. %A Glicenstein, J. F. %A Goret, P. %A Hadjichristidis, C. %A Hauser, D. %A Hauser, M. %A Heinzelmann, G. %A Henri, G. %A Hermann, G. %A Hinton, J. A. %A Hofmann, W. %A Holleran, M. %A Horns, D. %A Jacholkowska, A. %A de Jager, O. C. %A Khélifi, B. %A Komin, Nu. %A Konopelko, A. %A Kosack, K. %A Latham, I. J. %A Le Gallou, R. %A Lemière, A. %A Lemoine-Goumard, M. %A Lohse, T. %A Martin, J.M. %A Martineau-Huynh, O. %A Marcowith, A. %A Masterson, C. %A Mccomb, T. J. L. %A de Naurois, M. %A Nedbal, D. %A Nolan, S. J. %A Noutsos, A. %A Orford, K. J. %A Osborne, J. L. %A Ouchrif, M. %A Panter, M. %A Pelletier, G. %A Pita, S. %A Pühlhofer, G. %A Punch, M. %A Raubenheimer, B. C. %A Raue, M. %A Rayner, S. M. %A Reimer, A. %A Reimer, O. %A Ripken, J. %A Rob, L. %A Rolland, L. %A Rowell, G. %A Sahakian, V. %A Saugé, L. %A Schlenker, S. %A Schlickeiser, R. %A Schwanke, U. %A Sol, H. %A Spangler, D. %A Spanier, F. %A Steenkamp, R. %A Stegmann, C. %A Superina, G. %A Tavernet, J.-P. %A Terrier, R. %A Théoret, C.G. %A Tluczykont, M. %A van Eldik, C. %A Vasileiadis, G. %A Venter, C. %A Vincent, P. %A Völk, H. J. %A Wagner, S. J. %A Ward, M. %Z 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 %< avec comité de lecture %Z APC-06-116 %@ 0031-9007 %J Physical Review Letters %I American Physical Society %V 97 %P 221102 %8 2006 %D 2006 %Z astro-ph/0610509 %Z 2006PhRvL..97v1102A %R 10.1103/PhysRevLett.97.221102 %Z 98.70.Rz, 95.35.+d, 95.85.Pw, 98.35.Jk %Z Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles %X 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. %G English %Z HESS %L in2p3-00137679 %U https://hal.in2p3.fr/in2p3-00137679 %~ IN2P3 %~ OBSPM %~ CEA %~ INSU %~ METEO %~ UNIV-PARIS7 %~ X %~ UPMC %~ UNIV-TLSE3 %~ UGA %~ LPTA %~ LLR %~ LPNHE %~ APC %~ CNRS %~ UNIV-GRENOBLE1 %~ UNIV-MONTP2 %~ CNES %~ OSUG %~ LUTH %~ OMP %~ OMP-CESR %~ OMP-IRAP %~ X-LLR %~ LAOG %~ X-DEP %~ X-DEP-PHYS %~ DSM-IRFU %~ IRFU-APC %~ PSL %~ UPMC_POLE_2 %~ UNIV-MONTPELLIER %~ CEA-DRF %~ SORBONNE-UNIVERSITE %~ SU-SCIENCES %~ UNIV-PARIS %~ UP-SCIENCES %~ OBSPM-PSL %~ SU-TI %~ ALLIANCE-SU %~ UNIV-UT3 %~ UT3-INP %~ UT3-TOULOUSEINP %~ UM1-UM2 %~ LPNHE-2