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Observations of the Galactic Centre Region in Very High Energy Gamma-Rays with H.E.S.S.

MPG-Autoren
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Hinton,  James A.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Funk,  Stefan
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Hofmann,  Werner
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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de Naurois,  M.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Hinton, J. A., Funk, S., Hofmann, W., Rolland, L., & de Naurois, M. (2005). Observations of the Galactic Centre Region in Very High Energy Gamma-Rays with H.E.S.S. In B. S. Acharya, S. Gupta, P. Jagadeesan, A. Jain, S. Karthikeyan, S. Morris, et al. (Eds.), Proceedings of the 29th International Cosmic Ray Conference (pp. 21-22). Navy Nagar, Colaba, Mumbai, MH-400005: Tata Institute of Fundamental Research.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-8785-B
Zusammenfassung
The central 300 parsecs of our Galaxy contain the richest population of potential very high energy (VHE) γ-ray sources of any part of the sky. The wide field of view of H.E.S.S. [1] (5⁰) allows us to observe all of these candidate sources with a single pointing of the instrument. In addition to the known γ-ray sources G 0.9+0.1 [2] and HESS J1745-290 (close to Sgr A*) [3, 4, 5], the region contains several shell-type SNR, at least one additional pulsar wind nebula (the `Mouse', G359.23-0.82) and two unidenti ed EGRET sources. In addition to these potential 'active' particle accelerators, the Galactic Centre (GC) region provides probably the best target for the detection of VHE γ-rays from 'passive' cosmic ray targets [6]. The dense and massive molecular clouds of the region, Sgr A, B and C, provide efficient targets for diffuse cosmic rays, leading to γ-ray production via the decay of neutral pions. At lower energies the EGRET instrument detected strong diffuse emission from the GC region [7]. However, the presence of two strong sources in the region and the rather poor angular resolution of EGRET, prevented the determination of the density of ~GeV cosmic rays in this region. With the order of magnitude better angular resolution of H.E.S.S. the giant molecular clouds of the region are individually resolvable.