An advanced analysis method for stereoscopic systems of Cherenkov Telescopes in gamma-ray astronomy

Details An advanced analysis method for stereoscopic systems of Cherenkov Telescopes in gamma-ray astronomy An advanced analysis method for stereoscopic systems of Cherenkov Telescopes in gamma-ray astronomy

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..355l&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

Computer Science

Performance

Scientific paper

H.E.S.S. (High Energy Stereoscopic System) is an array of four large imaging Cherenkov telescopes devoted to gamma-ray astronomy above 100 GeV. It has been fully operational since December 2003. The stereoscopic reconstruction of air showers and the high-definition imaging bring significant improvements both in flux sensitivity and energy resolution with respect to previous Atmospheric Cherenkov Telescopes. Here we report on a new analysis method based on a very simple 3D-modelling of an electromagnetic air shower. This method allows to separate gamma-rays from background events in the field of view without any assumption on the morphology of the source or on the background distribution. This is a crucial point in the study of extended sources (e.g Supernovae Remnants) or in the search for unexpected sources in a sky survey.
The performance of the method as compared to the standard analysis, in particular regarding background rejection, angular and energy resolutions will be presented. Results of the method based on real data taken on galactic sources will also be shown.

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