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Very high energy gamma rays from the direction of Sagittarius A
journal contribution
posted on 2012-10-24, 08:53 authored by F. Aharonian, A. G. Akhperjanian, KM. Aye, A. R. Bazer-Bachi, M. Beilicke, W. Benbow, D. Berge, P. Berghaus, K. Bernlohr, O. Bolz, C. Boisson, C. Borgmeier, F. Breitling, A. M. Brown, J. B. Gordo, P. M. Chadwick, V. R. Chitnis, L. M. Chounet, R. Cornils, L. Costamante, B. Degrange, A. Djannati-Atai, L. O. Drury, T. Ergin, P. Espigat, F. Feinstein, P. Fleury, G. Fontaine, S. Funk, Y. Gallant, B. Giebels, S. Gillessen, P. Goret, J. Guy, C. Hadjichristidis, M. Hauser, G. Heinzelmann, G. Henri, G. Hermann, J. A. Hinton, W. Hofmann, M. Holleran, D. Horns, de Jager O. C., I. Jung, B. Khelifi, N. Komin, A. Konopelko, IJ. Latham, Le Gallou R., M. Lemoine, A. Lemiere, N. Leroy, T. Lohse, A. Marcowith, C. Masterson, T. J. L. McComb, de Naurois A., S. J. Nolan, A. Noutsos, K. J. Orford, J. L. Osborne, M. Ouchrif, M. Panter, G. Pelletier, S. Pita, M. Pohl, G. Puhlhofer, M. Punch, B. C. Raubenheimer, M. Raue, J. Raux, S. M. Rayner, I. Redondo, A. Reimer, O. Reimer, J. Ripken, M. Rivoal, L. Rob, L. Rolland, G. Rowell, V. Sahakian, L. Sauge, S. Schlenker, R. Schlickeiser, C. Schuster, U. Schwanke, M. Siewert, H. Sol, R. Steenkamp, C. Stegmann, J. P. Tavernet, C. G. Theoret, M. Tluczykont, van der Walt D. J., G. Vasileiadis, P. Vincent, B. Visser, H. J. Volk, S. J. WagnerWe report the detection of a point-like source of very high energy (VHE) $\gamma$-rays coincident within 1' of Sgr A *, obtained with the HESS array of Cherenkov telescopes. The $\gamma$-rays exhibit a power-law energy spectrum with a spectral index of $-2.2 \pm 0.09 \pm 0.15$ and a flux above the 165 GeV threshold of $(1.82 \pm 0.22) \times 10^{-7}$ m -2 s -1. The measured flux and spectrum differ substantially from recent results reported in particular by the CANGAROO collaboration.
History
Citation
Astronomy & Astrophysics, 2004, 425 (1), pp. L13-L17Version
- VoR (Version of Record)