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…
Discovery of very-high-energy gamma-rays from the Galactic Centre ridge
The origin of Galactic cosmic rays (with energies up to 10^15 eV) remains unclear, though it is widely believed that they originate in the shock waves of expanding supernova remnants. Currently the best way…
The H.E.S.S. survey of the Inner Galaxy in very high-energy gamma-rays
We report on a survey of the inner part of the Galactic Plane in very high energy gamma-rays, with the H.E.S.S. Cherenkov telescope system. The Galactic Plane between +-30deg in longitude and +-3deg in…
Energy dependent gamma-ray morphology in the Pulsar wind nebula HESSJ1825-137
Detailed morphological and spatially resolved spectral studies reveal the very high-energy (VHE) gamma-ray aspects of this object with unprecedented precision. We confirm previous results obtained in a survey of the Galactic Plane in 2004.…
