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T: Teilchenphysik

T 601: Kosmische Strahlung IX

T 601.7: Vortrag

Dienstag, 8. März 2005, 18:05–18:20, TU H105

Calibration of the pixel chain in the MAGIC Telescope — •David Paneque — Max-Planck-Institut für Physik, Föhringer Ring 6, 80805 München

MAGIC is the largest Imaging Atmospheric Cherenkov Telescope (IACT) world-wide. MAGIC is installed at the Roque de los Muchachos Observatory (2200 m above see level), on the Canary island of La Palma (28.80 N, 17.90 W). The experiment is expected to perform gamma-ray astronomy in the energy range from 30 GeV to 30 TeV.

The analysis of the shower images produced in the camera of an IACT is partly based on the comparison of the measured image shape and light content with Monte Carlo predictions. In order to perform this comparison, the conversion factors between the recorded amount of FADC counts and the amount of photons impinging on the camera must be accurately known for the individual pixels. It is therefore mandatory to calibrate the telescope camera with respect to the light flux over a large dynamic range. In the presentation, I will report about the performance of the methods used to carry out this calibration. Measurements of the spectral gamma-ray flux emitted by the Crab nebula will be provided as a cross-check of this calibration.