Very high-energy gamma rays from the direction of Sagittarius A* Author(s): Aharonian F., Bazer-Bachi A.R., Berghaus P., Boisson C., Gordo J. Bussons, Chitnis V.R., Chounet L.-M., Degrange B., Djannati-Atai A., Espigat P., Feinstein F., Fleury P., Fontaine G., Gallant Y., Giebels B., Goret P., Guy J., Henri G., Lemoine M., Leroy N., Marcowith A., Naurois M. De, Ouchrif M., Pelletier G., Pita S., Punch M., Raux J., Redondo I., Rivoal M., Vasileiadis G. (Article) Published: Astronomy & Astrophysics, vol. 425 p.L13-L17 (2004) Links openAccess full text : Ref HAL: in2p3-00022258_v1 Ref Arxiv: astro-ph/0408145 DOI: 10.1051/0004-6361:200400055 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 342 citations Abstract: We report the detection of a point-like source of very high energy (VHE) gamma-rays coincident within 1' of Sgr A*, obtained with the H.E.S.S. array of Cherenkov telescopes. The gamma-rays exhibit a power-law energy spectrum with a spectral index of -2.2 +/- 0.09 +/- 0.15 and a flux above the 165 GeV threshold of (1.82 +/- 0.22) \times 10^{-7} m^{-2} s^{-1}. The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration. |