Discovery of a point-like very-high-energy γ-ray source in Monoceros
Aims.The complex Monoceros Loop SNR/Rosette Nebula region contains several potential sources of very-high-energy (VHE) γ-ray emission and two as yet unidentified high-energy EGRET sources. Sensitive VHE observations are required to probe acceleration processes in this…
Detection of extended very-high-energy γ-ray emission towards the young stellar cluster Westerlund 2
Aims. Results from γ-ray observations by the HESS telescope array in the direction of the young stellar cluster Westerlund 2 are presented. Methods. Stereoscopic imaging of Cherenkov light emission of γ-ray induced showers in…
First ground-based measurement of atmospheric Cherenkov light from cosmic rays
A recently proposed novel technique for the detection of cosmic rays with arrays of Imaging Atmospheric Cherenkov Telescopes is applied to data from the High Energy Stereoscopic System (H.E.S.S.). The method relies on the…
Fast Variability of Tera–Electron Volt γ Rays from the Radio Galaxy M87
The detection of fast variations of the tera–electron volt (TeV) (1012 eV) γ-ray flux, on time scales of days, from the nearby radio galaxy M87 is reported. These variations are about 10 times as…
HESS Observations of the Galactic Center Region and Their Possible Dark Matter Interpretation
The detection of 𝛾 rays from the source HESS J1745-290 in the Galactic Center (GC) region with the High Energy Spectroscopic System (HESS) array of Cherenkov telescopes in 2004 is presented. After subtraction of…
Primary particle acceleration above 100 TeV in the shell-type supernova remnant RX J1713.7-3946 with deep HESS observations
Aims: We present deep HESS observations of the supernova remnant (SNR) RX J1713.7-3946. Combining data of three years – from 2003 to 2005 – we obtain significantly increased statistics and energy coverage as compared…
3.9 day orbital modulation in the TeV γ-ray flux and spectrum from the X-ray binary LS 5039
Aims. LS 5039 is a High Mass X-ray Binary (HMXRB) comprising a compact object in an eccentric 3.9 day orbit around a massive O6.5V star. Observations at energies above 0.1 TeV (1011 eV) by the High Energy Stereoscopic…
Energy dependent γ-ray morphology in the pulsar wind nebula HESS J1825–137
Aims. We present results from deep γ-ray observations of the Galactic pulsar wind nebula HESS J1825–137 performed with the HESS array. Methods. Detailed morphological and spatially resolved spectral studies reveal the very high-energy (VHE)…
Observations of the Crab nebula with HESS
Context: The Crab nebula was observed with the HESS stereoscopic Cherenkov-telescope array between October 2003 and January 2005 for a total of 22.9 h (after data quality selection). This period of time partly overlapped…
Discovery of the two “wings” of the Kookaburra complex in VHE γ-rays with HESS
Aims. Search for Very High Energy γ-ray emission in the Kookaburra complex through observations with the HESS array. Methods: Stereoscopic imaging of Cherenkov light emission of the γ-ray showers in the atmosphere is used…
