H.E.S.S. constraints on Dark Matter annihilations towards the Sculptor and Carina Dwarf Galaxies
The Sculptor and Carina Dwarf spheroidal galaxies were observed with the H.E.S.S. Cherenkov telescope array between January 2008 and December 2009. The data sets consist of a total of 11.8 and 14.8 hours of…
Revisiting the Westerlund 2 field with the H.E.S.S. Telescope Array
Aims. Previous observations with the H.E.S.S. telescope array revealed the existence of extended very-high-energy (VHE; E>100 GeV) {\gamma}-ray emission, HESS J1023-575, coincident with the young stellar cluster Westerlund 2. At the time of discovery,…
H.E.S.S. Observations of the Globular Clusters NGC 6388 and M15 and Search for a Dark Matter Signal
Observations of the globular clusters (GCs) NGC 6388 and M15 were carried out by the High Energy Stereoscopic System array of Cherenkov telescopes for a live time of 27.2 and 15.2 hr, respectively. No…
Search for a Dark Matter Annihilation Signal from the Galactic Center Halo with H.E.S.S.
A search for a very-high-energy (VHE; ≥100 GeV) 𝛾-ray signal from self-annihilating particle dark matter (DM) is performed towards a region of projected distance 𝑟 ∼45–150 pc from the Galactic center. The background-subtracted 𝛾-ray spectrum measured…
HESS J1943+213: a candidate extreme BL Lacertae object
Context. The H.E.S.S. Cherenkov telescope array has been surveying the Galactic plane for new VHE (>100 GeV) gamma-ray sources. Aims. We report on a newly detected point-like source, HESS J1943+213. This source coincides with an unidentified…
Detection of very-high-energy γ-ray emission from the vicinity of PSR B1706–44 and G 343.1–2.3 with H.E.S.S.
The γ-ray pulsar PSR B1706−44 and the adjacent supernova remnant (SNR) candidate G 343.1−2.3 were observed by H.E.S.S. during a dedicated observation campaign in 2007. As a result of this observation campaign, a new source of…
Search for Lorentz Invariance breaking with a likelihood fit of the PKS 2155-304 flare data taken on MJD 53944
Several models of Quantum Gravity predict Lorentz Symmetry breaking at energy scales approaching the Planck scale (∼1019 GeV). With present photon data from the observations of distant astrophysical sources, it is possible to constrain…
Discovery of VHE gamma-rays from the BL Lac object PKS 0548-322
PKS 0548-322 (z=0.069) is a “high-frequency-peaked” BL Lac object and a candidate very high energy (VHE, E>100 GeV) gamma-ray emitter, due to its high X-ray and radio flux. Observations at the VHE band provide…
VHE gamma-ray emission of PKS 2155-304: spectral and temporal variability
Observations of very high energy gamma-rays from blazars provide information about acceleration mechanisms occurring in their innermost regions. Studies of variability in these objects allow a better understanding of the mechanisms at play. To…
