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T: Teilchenphysik

T 301: Kosmische Strahlung III

T 301.5: Talk

Tuesday, March 19, 2002, 15:30–15:45, HS 19

High zenith angle observations of SN1006 with HEGRA CT1 imaging air Cherenkov telescope — •Vincenzo Vitale — Max-Planck Institute for Physics Muenchen

The imaging air Cherenkov telescopes (IACTs) can observe emission of gamma rays at 100’s of GeV-TeV energies. With these telescopes one is detecting the Cherenkov light component produced by secondary particles in extensive air showers initiated by primary gammas or hadrons.

In 1996-97 the CANGAROO telescope, located in southern hemisphere has measured TeV gamma rays from the shell-type Supernova remnant SN1006.

The IACTs in the Northern hemisphere can observe the SN1006 only at very large zenith angles. The energy threshold of IACTs increases with zenith angle and also the gamma/hadrons separation, needed for the signal identification, is becoming more difficult.

The HEGRA CT1 telescope, located on Canary island La Palma has performed observations of SN1006 during 1999, 2000, 2001. A preliminary analysis will be presented.