Heidelberg 2022 – scientific programme

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AKPIK: Arbeitskreis Physik, moderne Informationstechnologie und Künstliche Intelligenz

AKPIK 2: Data Analytics & Machine Learning

AKPIK 2.1: Talk

Wednesday, March 23, 2022, 16:15–16:30, AKPIK-H13

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

In very-high-energy gamma-ray astronomy, the Instrument Response Function (IRF) relates the observed and reconstructed properties to the original properties of the primary particles. The IRFs are usually factored into multiple components, namely the Effective Area, the Energy Dispersion and the Point Spread Function that are needed for the proper reconstruction of spectral and spacial information. These quantities are derived from Monte Carlo Simulations but depend on observation conditions like telescope pointing direction or atmospheric transparency. Producing a complete IRF for every observation taken is a time consuming task and not feasible on the short timescales needed to release e.g. an alert for a transient event. In consequence, IRFs are typically produced at fixed combinations of observation conditions. To derive the optimal IRFs for a given observation, interpolation techniques are investigated. This talk will summarize interpolation strategies that are being tested for the Cherenkov Telescope Array IRFs.