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

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 : arxiv


Ref HAL: in2p3-00022258_v1
Ref Arxiv: astro-ph/0408145
DOI: 10.1051/0004-6361:200400055
Ref. & Cit.: NASA ADS
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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.