Iryna Lypova, Analysis optimisation for >10 TeV gamma-ray astronomy with IACTs

Friday 8 Oct 2021, 10:30 → 11:30 Europe/Berlin

The High Energy Stereoscopic System (H.E.S.S.) is one of the currently operating Imaging Atmospheric Cherenkov Telescopes. H.E.S.S. operates in the broad energy range from a few tens of GeV to more than 50 TeV reaching its best sensitivity around 1 TeV. However, there are many important topics, which require good sensitivity at energies above 10 TeV. Therefore, event analysis was optimised for the highest energies accessible to H.E.S.S., aiming to improve the sensitivity above 10 TeV. It includes the employment of improved event direction reconstruction and gamma-hadron separation. And for the first time, also extensive air showers with event offsets up to 4.5 deg from the camera centre are considered in the analysis, thereby increasing the effective Field-of-View of H.E.S.S. from 5 to 9 deg.