Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 78: Gamma Astronomy II

T 78.3: Vortrag

Donnerstag, 3. April 2025, 16:45–17:00, VG 2.103

Investigating the Effects of Symmetry Assumptions in the Instrument Response of the Cherenkov Telescope Array Observatory — •Luca Davide Di Bella and Tristan Franziskus Gradetzke — TU Dortmund University, Dortmund, Germany

The Cherenkov Telescope Array Observatory is the next generation of Imaging Air Cherenkov Telescope observatories, designed to operate in an energy range between 20 GeV to 300 TeV and achieve higher sensitivities and lower systematic uncertainties than previous experiments. An important data analysis step to achieving the systematic uncertainty targets is accurate modeling of the instrument response. This is done in discrete intervals of the relevant quantities using Monte Carlo simulated events to ensure accuracy.

In order to reduce the necessary amount of simulations, the Instrument Response Functions (IRFs) are assumed to be radially symmetric over the field of view of the telescopes. Due to for example atmospheric effects, this simplification is not necessarily accurate, especially at higher zenith distances. It is thus necessary to implement computation of non-radially symmetric Instrument Response Functions and evaluate their impact on the measurement.

More complex implementations, which allow asymmetry of the IRFs, have been implemented and will be compared against the existing radially symmetric implementations using simulated data sets.

Keywords: Gamma-ray Astronomy; Instrument Response Function; DL3