Constraints on the gamma-ray emission from the cluster-scale AGN outburst in the Hydra A galaxy cluster
Context. In some galaxy clusters, powerful active galactic nuclei (AGN) have blown bubbles with cluster scale extent into the ambient medium. The main pressure support of these bubbles is not known to date, but…
Spectral Analysis and Interpretation of the γ-Ray Emission from the Starburst Galaxy NGC 253
Very high energy (VHE; E ⩾ 100 GeV) and high-energy (HE; 100 MeV ⩽ E ⩽ 100 GeV) data from γ-ray observations performed with the H.E.S.S. telescope array and the Fermi-LAT instrument, respectively, are analyzed in order…
Discovery of gamma-ray emission from the extragalactic pulsar wind nebula N 157B with H.E.S.S.
We present the significant detection of the first extragalactic pulsar wind nebula (PWN) detected in gamma rays, N 157B, located in the large Magellanic Cloud (LMC). Pulsars with high spin-down luminosity are found to power…
HESS observations of the Carina nebula and its enigmatic colliding wind binary Eta Carinae
The massive binary system Eta Carinae and the surrounding H ii complex, the Carina nebula, are potential particle acceleration sites from which very high energy (VHE; E≥ 100 GeV) γ-ray emission could be expected.…
Discovery of VHE γ-ray emission and multi-wavelength observations of the BL Lacertae object 1RXS J101015.9−311909
1RXS J101015.9 − 311909 is a galaxy located at a redshift of z = 0.14 hosting an active nucleus (called AGN) belonging to the class of bright BL Lac objects. Observations at high (HE, E > 100 MeV) and very high (VHE, E > 100 GeV)…
Search for Dark Matter Annihilation Signals from the Fornax Galaxy Cluster with H.E.S.S.
The Fornax galaxy cluster was observed with the High Energy Stereoscopic System for a total live time of 14.5 hr, searching for very high energy (VHE; E > 100GeV) γ-rays from dark matter (DM) annihilation.…
Discovery of VHE emission towards the Carina arm region with the H.E.S.S. telescope array: HESS J1018–589
The Carina arm region, containing the supernova remnant SNR G284.3–1.8, the high-energy (HE; E > 100 MeV) binary 1FGL J1018.6–5856 and the energetic pulsar PSR J1016–5857 and its nebula, has been observed with the H.E.S.S. telescope array. The observational coverage…
A multiwavelength view of the flaring state of PKS 2155-304 in 2006
Context. Multiwavelength (MWL) observations of the blazar PKS 2155-304 during two weeks in July and August 2006, the period when two exceptional flares at very high energies (VHE, E ≳ 100 GeV) occurred, provide a detailed picture of…
Discovery of hard-spectrum γ-ray emission from the BL Lacertae object 1ES 0414+009
Context. 1ES 0414 + 009 (z = 0.287) is a distant high-frequency-peaked BL Lac object, and has long been considered a likely emitter of very-high-energy (VHE, E > 100 GeV) γ-rays due to its high X-ray and radio flux. Aims. Observations in…
The 2010 Very High Energy γ-Ray Flare and 10 Years of Multi-wavelength Observations of M 87
The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3 − 6) × 109 M☉) provides a unique opportunity to investigate the origin of very high energy (VHE;…
