Heidelberg 2007 – scientific programme

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T: Fachverband Teilchenphysik

T 302: γ-Astronomie II

T 302.9: Talk

Wednesday, March 7, 2007, 18:45–19:00, INF 308 Kl. HS

Determination of atmospheric parameters relevant for IACTs — •Jürgen Hose, Martin Fuchs, and Razmik Mirzoyan — MPI for physics, Munich, Germany

Observation of Cherenkov-radiation from particle showers induced by high energy (GeV-TeV) cosmic rays in the high atmospheric layers is influenced by several physical parameters of the atmosphere. This is important for ground-based VHE gamma ray telescopes. The knowledge and monitoring of these parameters is of great importance for the interpretation of the measured data. We are using a micro-LIDAR operating at 532 nm for monitoring the sky transparency. Some relevant data will be shown. Also, we are using a so called pyrometer for measuring the thermal radiation back-reflected by clouds. This helps to detect clouds in the aperture of the telescope.