Erlangen 2026 – scientific programme

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T: Fachverband Teilchenphysik

T 61: Gamma Astronomy I

T 61.3: Talk

Wednesday, March 18, 2026, 16:45–17:00, KS 00.005

Shower based cross-calibration of swgo — •Florian Foith, Alison Mitchell, and Martin Schneider for the SWGO collaboration — ECAP, FAU Erlangen-Nürnberg

This work discusses the possibility of calibrating the effective efficiencies of Water Cherenkov detectors (WCDs) at the Southern Wide-field Gamma-ray Observatory (SWGO) by utilizing pairwise charge asymmetry parameters. These parameters are computed for single shower events and then averaged over all conducted simulations. The concept, originally proposed for Imaging Atmospheric Cherenkov Telescopes (IACTs), has proven successful for the Cherenkov Telescope Array (CTA) and is now being tested with two possible approaches for asymmetry parameter computation for SWGO. We found that following preliminary testing against grid anomalies, our method demonstrates promising accuracy within the limitations of WCD-based gamma-ray observatories.

Keywords: Calibration; swgo; Water Cherenkov detectors; Monte Carlo Simulations