Mainz 2014 – scientific programme
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T: Fachverband Teilchenphysik
T 49: Gammaastronomie 3
T 49.6: Talk
Tuesday, March 25, 2014, 18:05–18:20, P2
Status of the new Sum-Trigger-II system for the MAGIC Telescopes. — •Jezabel R. Garcia1,2, F. Dazzi1,3, D. Haefner1, D. Herranz4, M. Lopez4, M. Mariotti3, R. Mirzoyan1, D. Nakajima1, T. Schweizer1, and M. Teshima1 for the MAGIC collaboration — 1Max Planck Institut für Physik, München, Deutschland — 2Instituto Astrofisico de Canarias, SC. de la Laguna, España — 3University of Padova & INFN Sezione di Padova, Padova, Italy — 4Universidad Complutense de Madrid, Madrid, España
MAGIC is a stereoscopic system of two 17 m diameter Imaging Air Cherenckov Telescopes (IACTs) for gamma ray astronomy, situated on the island of La Palma. Lowering the energy threshold of IACTs is crucial for the observation of Pulsars, high redshift AGNs and GRBs. A lower threshold compared to conventional digital trigger can be achieved by means of a novel concept, the so called Sum Trigger, based on the analogue sum of a patch of pixels. In 2007, the Sum-Trigger prototype was tested on MAGIC I, reaching a 25 GeV threshold. It allowed the first VHE detection for the Crab Pulsar. In December 2013 the new stereoscopic Sum-Triggeri-II system was installed. We will report about the development, installation, commissioning and performance of the system.