The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula

By M. Aleksic, Stefano Ansoldi, L. A. Antonelli, P. Antoranz, A. Babić, P. Bangale, M. Barceló, J. Barrio, J. González, W. Bednarek and 241 more. 2014

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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 observations the trigger threshold of the MAGIC telescopes is∼ 50 GeV. The integral sensitivity for 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 re solution 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 following components: < 15% in energy scale, 11-18% in flux normalization and ±0.15 for the energy spectrum power-law slope.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/bfe973703703c348922ba0c9d2c0136151ff1748

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Citations in the corpus

The IceCube Realtime Alert System (2016, methodology): “When a signiﬁcant cluster is observed, the information is forwarded to the MAGIC [40] and VERITAS telescopes [41] (depending on source visibility at each site and distance from the Moon) to search for a coincident ﬂare in very high-energy gamma rays.”
The First LHAASO Catalog of Gamma-Ray Sources (2023, background): “The successful operation of the second generation Imaging Atmospheric Cherenkov Telescopes (IACTs), such as H.E.S.S. (Aharonian et al. 2006), MAGIC (Aleksi´c et al. 2016), and VERITAS (Meagher & VERITAS Collaboration 2015), has significantly increased the number of detected VHE gamma-ray sources fro”
Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A (2018, background): “The Major Atmospheric Gamma Imaging Cherenkov (MAGIC) Telescopes (34) observed TXS 0506+056 for 2 hours on 24 September 2017 (MJD 58020) under nonoptimal weather conditions and then for a period of 13 hours from 28 September to 4 October 2017 (MJD 58024– 58030) under good conditions.”
The Blazar TXS 0506+056 Associated with a High-energy Neutrino: Insights into Extragalactic Jets and Cosmic-Ray Acceleration (2018, methodology): “The systematic uncertainties of MAGIC spectral measurements can be divided into: < 15% in energy scale, 11-18% in flux normalization and ± 0.15 for the energy spectrum power-law slope (Aleksić et al. 2016).”