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HESS observations of extragalactic objects

Results from HESS observations 2003–2005

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Abstract

The HESS experiment (High Energy Stereoscopic System), consisting of four imaging atmospheric Cherenkov telescopes (IACTs) in Namibia, has observed many extragalactic objects in the search for very high energy (VHE) γ-ray emission. These objects include active galactic nuclei (AGN), notably Blazars, Seyferts, radio galaxies, starburst galaxies and others. Beyond the established sources, γ-ray emission has been detected for the first time from several of these objects by HESS, and their energy spectra and variability characteristics have been measured. Multi-wavelength campaigns, including X-ray satellites, radio telescopes, and optical observations, have been carried out for AGNs, in particular for PKS 2155-304, H 2356-309 and 1ES 1101-232, for which the implications concerning emission models are presented. Also results from the investigations of VHE flux variability from the giant radio galaxy M 87 are shown.

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  1. Institut für Experimentalphysik, University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany

    Matthias Beilicke

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  1. Matthias Beilicke
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Correspondence to Matthias Beilicke.

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For the HESS Collaboration.

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Beilicke, M. HESS observations of extragalactic objects. Astrophys Space Sci 309, 139–145 (2007). https://doi.org/10.1007/s10509-007-9400-4

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  • DOI: https://doi.org/10.1007/s10509-007-9400-4

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