H.E.S.S.

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.

The five H.E.S.S. Imaging Atmospheric Cherenkov Telescopes in Namibia. Credits: Stefan Klepser

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 Hess Observatory from vikas chander on Vimeo.

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:

VHE gamma-ray discovery and multi-wavelength study of the blazar 1ES 2322-409, H.E.S.S. Collaboration, MNRAS, 2019

The gamma-ray spectrum of the core of Centaurus A as observed with H.E.S.S. and Fermi-LAT, H.E.S.S. Collaboration et al., A&A, 2018

H.E.S.S. discovery of very-high-energy gamma-ray emission of PKS 1440-389, ICRC 2015

Discovery of high and very high-energy emission from the BL Lacertae object SHBL J001355.9–185406, H.E.S.S. Collaboration, A&A, 2013

H.E.S.S and Fermi-LAT discovery of gamma rays from the blazar 1ES 1312-423, H.E.S.S. Collaboration et al., MNRAS, 2013

Discovery of very high energy gamma-ray emission from the BL Lac object PKS 0301-243 with H.E.S.S, H.E.S.S. Collaboration, A&A, 2103

Discovery of VHE γ-ray emission from the very distant BL Lac KUV 00311-1938 by H.E.S.S., AIP 2012

Discovery of VHE gamma-ray emission and multi-wavelength observations of the BL Lac object 1RXS J101015.9-311909, H.E.S.S. Collaboration, A&A, 2012

A new analysis strategy for detection of faint gamma-ray sources with Imaging Atmospheric Cherenkov Telescopes, Y. Becherini et al., Astroparticle Physics, 2011

Detection of Gamma Rays from a Starburst Galaxy, HESS Collaboration, Science, 2009