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          Institute: MPI für Physik     Collection: MPI für Physik     Display Documents

ID: 544388.0, MPI für Physik / MPI für Physik
The central pixel of the MAGIC telescope for optical observations
Authors:Lucarelli, F.; Goebel, F.; Lorenz, E.; Otte, N.; et al.
Date of Publication (YYYY-MM-DD):2008
Title of Journal:Nuclear Instruments and Methods in Physics Research Section A
Journal Abbrev.:Nucl.Instrum.Meth.A
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The MAGIC telescope has been designed for the observation of Cerenkov light generated
in Extensive Air Showers initiated by cosmic particles. However, its 17 m. diameter mirror
and optical design makes the telescope suitable for direct optical observations as well. In
this paper, we report about the development of a system based on the use of a dedicated
photo-multiplier (PMT) for optical observations. This PMT is installed in the centre of
the MAGIC camera (the so-called central pixel). An electro-to-optical system has been
developed in order to transmit the PMT output signal by an optical fibre to the counting
room, where it is digitized and stored for off-line analysis. The performance of the system
using the optical pulsation of the Crab nebula as calibration source is presented. The time
required for a 5 sigma detection of the Crab pulsar in the optical band is less than 20 s. The central pixel will be mainly used to perform simultaneous observations of the Crab pulsar
both in the optical and gamma-ray regimes. It will also allow for periodic testing of the precision
of the MAGIC timing system using the Crab rotational optical pulses as a very precise
timing reference.
Classification / Thesaurus:MAGIC
Comment of the Author/Creator:accepted for publication in March 2008
External Publication Status:published
Document Type:Article
Communicated by:N.N.
Affiliations:MPI für Physik
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