Freiburg 2008 – scientific programme
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T: Fachverband Teilchenphysik
T 75: Gammaastronomie IV
T 75.3: Talk
Thursday, March 6, 2008, 17:15–17:30, KGII-HS 2006
Observation of the Crab pulsar with MAGIC using a special very low energy threshold analog sum trigger — •Maxim Shayduk1, Adam Nepomuk Otte1, Michael Rissi2, Thomas Schweizer3, Eckart Lorenz3, Razmik Mirzoyan3, and Masahiro Teshima3 — 1Humboldt-Universitaet, Berlin — 2ETH Zurich — 3Max Plank Institute, Muenchen
As shown by the EGRET experiment, the lightcurves of several pulsars seen in gamma-rays extend to the energies above 10 GeV. In order to detect gamma-rays of such energies by the Imaging Atmospheric Cherenkov Telescopes (IACTs), the significant lowering of the telescope trigger threshold is neccessary. The MAGIC telescope has a trigger threshold of 50-60 GeV - the lowest threshold in ground-based gamma-ray astronomy.
The MAGIC telescope observed the Crab pulsar in the last winter using a special summation trigger setup which allows one to reduce the trigger threshold down to 25-30GeV. MC studies showed that we are sensitive down to a 15GeV cutoff energy for the pulsed emission.
The observation results for the Crab pulsar will be presented here.