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;…
Discovery of extended VHE γ-ray emission from the vicinity of the young massive stellar cluster Westerlund 1
Aims. Results obtained in very-high-energy (VHE; E ≥ 100 GeV) γ-ray observations performed with the H.E.S.S. telescope array are used to investigate particle acceleration processes in the vicinity of the young massive stellar cluster Westerlund 1 (Wd 1). Methods.…
