SMuK 2023 – scientific programme

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AKPIK: Arbeitskreis Physik, moderne Informationstechnologie und Künstliche Intelligenz

AKPIK 2: Applications in Particle and Astroparticle Physics

AKPIK 2.6: Talk

Tuesday, March 21, 2023, 18:15–18:30, ZEU/0118

Interpolation of Instrument Response Functions for the Cherenkov Telescope Array — •Rune Michael Dominik and Maximilian Linhoff for the CTA consortium — Astroparticle Physics WG Elsässer, TU Dortmund University, Germany

The Cherenkov Telescope Array (CTA) will be the next generation ground-based very-high-energy gamma-ray observatory, utilizing tens of Imaging Atmospheric Cherenkov Telescopes at two sites once its construction and commissioning is finished. Like its predecessors, CTA relies on Instrument Response Functions (IRFs) to relate the observed and reconstructed properties to the original properties of primary particles. IRFs are needed for the proper reconstruction of spectral and spatial information and are thus among the data-products issued to the observatory's users. They are derived from Monte Carlo simulations and depend on observation conditions like the telescope pointing direction or the atmospheric transparency. Producing a complete set of IRFs from simulations for every observation taken is a time consuming task and not feasible when releasing data-products on short timescales. Consequently, interpolation techniques on simulated IRFs are investigated to quickly estimate IRFs for specific observation conditions. However, as some of an IRFs constituents are given as probability distributions, specialized methods are needed. This talk summarizes and compares the feasibility of multiple approaches to interpolate IRF components. First results are shown and open challenges are discussed.