SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 121: Cosmic Ray VI

T 121.6: Vortrag

Donnerstag, 23. März 2023, 17:05–17:20, POT/0081

Reconstruction of proton showers using H.E.S.S. — •Benedetta Bruno, Jonas Glombitza, and Stefan Funk for the H.E.S.S. collaboration — Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Nikolaus-Fiebiger-Str. 2, 91058 Erlangen, Germany

Imaging Atmospheric Cherenkov Telescopes (IACTs) - like the High Energy Stereoscopic System (H.E.S.S.) - observe extensive air showers initiated by gamma rays and cosmic rays (CRs) when interacting with the Earth's atmosphere. IACTs image the distribution of Cherenkov light emitted by air shower particles as they propagate toward the Earth's surface. The traditional reconstructions of the properties of the gamma rays rely on the Hillas parameterization, which reduces the measurement to a few characteristics using elliptical modelling of the image.

For the analysis of cosmic rays, which are usually considered background in gamma-ray astronomy, the reconstruction is more challenging. Since the development of hadronic-induced shower is subject to larger fluctuations, the detected IACT images feature deviations from the typical elliptical shape, making modifications necessary.

In this contribution, we utilize H.E.S.S. simulations to investigate the reconstruction of protons using the Hillas parametrization. In addition, we discuss the potential to use deep-learning-based reconstruction techniques to overcome the limits of the Hillas approach and outline the potential of H.E.S.S. data to measure the CR spectrum.