Volume 501 - 39th International Cosmic Ray Conference (ICRC2025) - Gamma-Ray Astrophysics
HEGS : Revisiting a decade of H.E.S.S. extragalactic observations
F. Brun*, D. Sanchez, A.M. Taylor, M. Cerruti, J.P. Lenain and  On behalf of the Hess Collaboration
*: corresponding author
Full text: pdf
Pre-published on: September 23, 2025
Published on: —
Abstract
During its first phase, from 2004 up to the end of 2012, the H.E.S.S. (High Energy Stereoscopic
System) experiment observed the extragalactic skies for more than 2700 hours. These data have been re-analysed in a single consistent framework, leading to the derivation of a catalog of 23 sources. In total, about 5.7% of the sky was observed, allowing for several additional studies to be conducted: source variability, extragalactic gamma-ray background light, and comparison with the Fermi-LAT catalogues. In this contribution, we discuss these results and present the high-level data (catalogs, maps) released to the astrophysical community.
DOI: https://doi.org/10.22323/1.501.0585
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