H.E.S.S. is an acronym for “High Energy Stereoscopic System”.
The H.E.S.S. telescopes are located in Namibia and are optimized for the detection of gamma-rays in the energy range from about 100 GeV to about 50 TeV. The official webpages of the experiment can be found here.
In H.E.S.S. we operate 5 single-mirror telescopes, four of which have a 12-m spherical dish (Davies-Cotton mounting), while the fifth latest addition has a 30-m parabolic dish.
The H.E.S.S. telescope array is the only ground-based detector of gamma-rays located in the Southern hemisphere and therefore the only able to observe the central part of our Galaxy.
Look at this recent excellent video by Vikas Chander showing the Namibian sky and the H.E.S.S. telescopes.
The H.E.S.S. project is in operation since 2003 and it has therefore successfully been observing the high energy Universe for 16 years. Recently, in January 2019, the steering committee of the project has decided to prolong the duration of the observations for an additional period of 3 years.
Our activities in H.E.S.S. are centred in the analysis of the observations made in the extra-galactic field. For this purpose we are specialized in the optimization of the analysis methods for faint and soft-spectrum sources.
A selection of papers we have been leading or contributing in the past in H.E.S.S. are: