Search for extended gammma-ray emission around AGN with H.E.S.S. and Fermi-LAT
Context: Very-high-energy (VHE; E>100 GeV) {\gamma}-ray emission from blazars inevitably gives rise to electron-positron pair production through the interaction of these {\gamma}-rays with the Extragalactic Background Light (EBL). Depending on the magnetic fields in…
Long-term TeV and X-ray observations of the gamma-ray binary HESS J0632+057
HESS J0632+057 is the only gamma-ray binary known so far whose position in the sky allows observations with ground-based observatories both in the northern and southern hemispheres. Here we report on long-term observations of…
H.E.S.S. Observations of the Crab during its March 2013 GeV Gamma-Ray Flare
Context. On March 4, 2013, the Fermi-LAT and AGILE reported a flare from the direction of the Crab Nebula in which the high-energy (HE; E > 100 MeV) flux was six times above its…
Search for Very-high-energy gamma-ray emission from Galactic globular clusters with H.E.S.S
Globular clusters (GCs) are established emitters of high-energy (HE, 100 MeV
Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S
Gamma-ray line signatures can be expected in the very-high-energy (VHE; E_\gamma > 100 GeV) domain due to self-annihilation or decay of dark matter (DM) particles in space. Such a signal would be readily distinguishable…
Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S
The extragalactic background light (EBL) is the diffuse radiation with the second highest energy density in the Universe after the cosmic microwave background. The aim of this study is the measurement of the imprint…
Constraints on axionlike particles with H.E.S.S. from the irregularity of the PKS 2155-304 energy spectrum
Axionlike particles (ALPs) are hypothetical light (sub-eV) bosons predicted in some extensions of the Standard Model of particle physics. In astrophysical environments comprising high-energy gamma rays and turbulent magnetic fields, the existence of ALPs…
Discovery of very high energy gamma-ray emission from the BL Lac object PKS 0301-243 with H.E.S.S
The active galactic nucleus PKS 0301-243 (z=0.266) is a high-synchrotron-peaked BL Lac object that is detected at high energies (HE, 100 MeV < E < 100 GeV) by Fermi/LAT. This paper reports on the…
H.E.S.S and Fermi-LAT discovery of gamma rays from the blazar 1ES 1312-423
A deep observation campaign carried out by the High Energy Stereoscopic System (H.E.S.S.) on Centaurus A enabled the discovery of gamma rays from the blazar 1ES 1312-423, two degrees away from the radio galaxy.…