A search for very high energy γ-ray emission from the starburst galaxy NGC 253 with HESS
We present the result of 28 h of observations of the nearby starburst galaxy NGC 253 with the HESS detector in 2003. We find no evidence for very high energy γ-ray emission from this…
Discovery of the binary pulsar PSR B1259-63 in very-high-energy gamma rays around periastron with HESS
We report the discovery of very-high-energy (VHE) γ-ray emission of the binary system PSR B1259-63/SS 2883 of a radio pulsar orbiting a massive, luminous Be star in a highly eccentric orbit. The observations around…
Observations of selected AGN with HESS
A sample of selected active galactic nuclei (AGN) was observed in 2003 and 2004 with the High Energy Stereoscopic System (HESS), an array of imaging atmospheric-Cherenkov telescopes in Namibia. The redshifts of these candidate…
Serendipitous discovery of the unidentified extended TeV γ-ray source HESS J1303-631
The serendipitous discovery of an unidentified extended TeV γ-ray source close to the galactic plane named HESS J1303-631 at a significance of 21 standard deviations is reported. The observations were performed between February and…
Discovery of Very High Energy Gamma Rays Associated with an X-ray Binary
X-ray binaries are composed of a normal star in orbit around a neutron star or stellar-mass black hole. Radio and x-ray observations have led to the presumption that some x-ray binaries called microquasars behave…
H.E.S.S. observations of PKS 2155-304
The high-frequency peaked BL Lac PKS 2155-304 at redshift z=0.117 has been detected with high significance (∼45σ) at energies greater than 160 GeV, using the H.E.S.S. stereoscopic array of imaging air-Cherenkov telescopes in Namibia.…
Upper limits to the SN1006 multi-TeV gamma-ray flux from HESS observations
Observations of the shell-type supernova remnant SN1006 have been carried out with the HESS system of Cherenkov telescopes during 2003 (18.2 h with two operating telescopes) and 2004 (6.3 h with all four telescopes).…
Observations of Mkn 421 in 2004 with HESS at large zenith angles
Mkn 421 was observed during a high flux state for nine nights in April and May 2004 with the fully operational High Energy Stereoscopic System (HESS) in Namibia. The observations were carried out at…
Detection of TeV γ-ray emission from the shell-type supernova remnant RX J0852.0-4622 with HESS
We report the detection of TeV γ-rays from the shell-type supernova remnant RX J0852.0-4622 with data of 3.2 h of live time recorded with HESS in February 2004. An excess of (700 ± 60)…
Discovery of VHE gamma rays from PKS 2005–489
The high-frequency peaked BL Lac PKS 2005-489 (z=0.071) was observed in 2003 and 2004 with the HESS stereoscopic array of imaging atmospheric-Cherenkov telescopes in Namibia. A signal was detected at the 6.7σ level in…
