Dresden 2013 – scientific programme
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T: Fachverband Teilchenphysik
T 76: DAQ, Trigger und Elektronik 1
T 76.3: Talk
Wednesday, March 6, 2013, 17:20–17:35, GER-039
Status of the new Sum-Trigger system for the MAGIC telescopes — Jezabel Rodriguez García1, Thomas Schweizer1, Daisuke Nakajima1, and •Francesco Dazzi2 — 1Max Planck Institute for Physics, München, Germany — 2Dipartimento di Fisica dell'Università di Udine and INFN sez. di Trieste, Italy
MAGIC is a stereoscopic system of two 17 meters Imaging Air Cherenckov Telescopes for gamma-ray astronomy operating in stereo mode. The telescopes are located at about 2.200 metres above sea level in the Observatorio del Roque de los Muchachos (ORM), in the Canary island of La Palma. Lowering the energy threshold of Cherenkov Telescopes is crucial for the observation of Pulsars, High redshift AGNs and GRBs. The Sum-Trigger, based on the analogue sum of a patch of pixels has a lower threshold compared to conventional digital triggers. The Sum-Trigger principle has been proven experimentally in 2007 by decreasing the energy threshold of the first Magic telescope (Back then operating in mono mode) from 55 GeV down to 25 GeV. The first VHE detection for the Crab Pulsar was achieved due to this low threshold.
After the upgrade of the MAGIC I and MAGIC II cameras and readout systems, we are planning to install a new Sum-Trigger system in both telescopes in Summer 2013. This trigger system will be operated for the first time in stereo mode. At the conference we will report about the status and the performance of the new Sum-Trigger-II system.