Very high energy gamma rays from the direction of Sagittarius A*

Details Very high energy gamma rays from the direction of Sagittarius A* Very high energy gamma rays from the direction of Sagittarius A*

2004-08-09

arxiv.org/abs/astro-ph/0408145v2

Astron.Astrophys. 425 (2004) L13-L17

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures, replacement with corrected EGRET points in Fig.4

Scientific paper

10.1016/j.astropartphys.2004.06.

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) * 10^-7 m^-2 s^-1. The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.

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