PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - GRI - Gamma Ray Indirect
The MAGIC Sum-Trigger-II System
D. Strom,* A. Berti, G. Ceribella, D. Corti, F. Dazzi, A. Dettlaff, J. Rodriguez García, M. Lopez, M. Mariotti, R. Mirzoyan, T. Schweizer
*corresponding author
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Pre-published on: July 22, 2019
Published on:
Abstract
The MAGIC telescopes, composed of two 17-meter diameter Imaging Air Cherenkov Telescopes (IACTs) situated 2200 meters above sea level on La Palma, detect very-high-energy gamma rays from the resulting Cherenkov air showers. They utilize a digital trigger system with an energy threshold of ~55 GeV. An alternative trigger, which sums analogue signals from adjacent regions of pixel groups, reduces the trigger threshold down to ~30 GeV. This Sum-Trigger-II recently allowed MAGIC to detect the Geminga Pulsar. We present detailed performance studies and operations of the Sum-Trigger-II system following a recent re-calibration period during Fall 2018 and Spring 2019. In addition, prospects and challenges for detecting GRB events with the Sum-Trigger-II, as well as potential future upgrades to the system, are discussed.
DOI: https://doi.org/10.22323/1.358.0802
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