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Performance of the MAGIC telescopes under moonlight

Aug 1, 2015, 3:30 PM
Mississippi Foyer (World Forum)

Mississippi Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 79
Poster contribution GA-EX Poster 2 GA


Pierre Colin (MPI fuer Physik)


MAGIC is a system of two 17m diameter Imaging Atmospheric Cherenkov Telescopes (IACT) located at the Observatorio del Roque de los Muchachos in the Canary island of La Palma. It observes the gamma-ray sky from ~50 GeV to more than 50 TeV. The IACT technique works preferentially in very dark condition. The best performance and lowest energy threshold are reached at dark astrophysical sites during moonless nights. However, the MAGIC telescopes have been designed to operate also with brighter Night Sky Background (NSB) light than dark nights. They can observe during twilight and moonlit nights. This allows us to increase the available observation time per year by about 50%. Here, we report about the performance of the MAGIC telescopes during moonlit nights based on observations of the Crab Nebula. Data analysis and Monte Carlo simulations must be adapted to the higher noise level induced by the moonlight. While the energy threshold depends dramatically on the NSB level, we show that other performance characteristics, such as the sensitivity, do not degrade significantly.
Collaboration MAGIC
Registration number following "ICRC2015-I/" 206

Primary author

Pierre Colin (MPI fuer Physik)


Daniel Gubermann (IFAE) Marcel Strzys (MPI fuer Physik) Oscar Blanch Bigas (Instituto de Fisica de Altas Energias (IFAE)) Roberta Zanin (U)

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