Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 101: Cosmic Ray 6

T 101.3: Vortrag

Donnerstag, 24. März 2022, 16:45–17:00, T-H33

Proton event reconstruction with the MAGIC experiment — •Alicia Fattorini and Maximilian Noethe for the MAGIC collaboration — Astroparticle Physics WG Elsässer, TU Dortmund University, Germany

Air showers induced by cosmic protons and heavier nuclei form the dominant background for very high energy gamma-ray observations with Imaging Air Cherenkov Telescopes. Even for strong very high energy gamma-ray sources the signal-to-background ratio in the raw data is typically less than 1:5000, so a very large statistic of cosmic proton and heavier nuclei induced events are available as a byproduct of gamma-ray source observations. In this contribution, we present the reconstruction of the particle type of primary events and the energy reconstruction of the events classified as protons. For this purpose, we used a random forest method trained and tested by using Monte Carlo simulations from the MAGIC telescopes, for energies above 70 GeV. We use the aict-tools framework, which includes machine learning methods for the particle type classification and energy reconstruction. The open-source Python project aict-tools was developed at TU Dortmund University and its reconstruction tools are based on scikit-learn predictors. Finally, an unfolding taking into account the background is performed to compensate for the typical bias of the random forest results. Here we report on the performance of the proton event reconstruction using the well-tested and robust random forest approach.