218 articles – 619 references  [version française]
 HAL: in2p3-00022258, version 1
 arXiv: astro-ph/0408145
 Astronomy and Astrophysics 425 (2004) L13-L17
 Very high-energy gamma rays from the direction of Sagittarius A*
 For the HESS collaboration(s)
 (2004)
 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.
 Subject(s) : Sciences of the Universe/AstrophysicsPhysics/Astrophysics/Cosmology and Extra-Galactic Astrophysics