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Referencia bibliográfica
Astroparticle Physics, Volume 72, p. 76-94.
Fecha de publicación:
1
2016
Revista
Número de citas
355
Número de citas referidas
243
Descripción
MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes
located in the Canary island of La Palma, Spain. During summer 2011 and
2012 it underwent a series of upgrades, involving the exchange of the
MAGIC-I camera and its trigger system, as well as the upgrade of the
readout system of both telescopes. We use observations of the Crab
Nebula taken at low and medium zenith angles to assess the key
performance parameters of the MAGIC stereo system. For low zenith angle
observations, the standard trigger threshold of the MAGIC telescopes is
∼ 50 GeV. The integral sensitivity for point-like sources with Crab
Nebula-like spectrum above 220 GeV is (0.66 ± 0.03)% of Crab
Nebula flux in 50 h of observations. The angular resolution, defined as
the σ of a 2-dimensional Gaussian distribution, at those energies
is ≲ 0.07°, while the energy resolution is 16%. We also
re-evaluate the effect of the systematic uncertainty on the data taken
with the MAGIC telescopes after the upgrade. We estimate that the
systematic uncertainties can be divided in the following components:
< 15% in energy scale, 11%-18% in flux normalization and ±
0.15 for the energy spectrum power-law slope.