Publication: The major upgrade of the MAGIC telescopes, Part I: The hardware improvements and the commissioning of the system
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Elsevier Science BV
The MAGIC telescopes are two Imaging Atmospheric Cherenkov Telescopes (IACTs) located on the Canary island of La Palma. The telescopes are designed to measure Cherenkov light from air showers initiated by gamma rays in the energy regime from around 50 GeV to more than 50 TeV. The two telescopes were built in 2004 and 2009, respectively, with different cameras, triggers and readout systems. In the years 2011-2012 the MAGIC collaboration undertook a major upgrade to make the stereoscopic system uniform, improving its overall performance and easing its maintenance. In particular, the camera, the receivers and the trigger of the first telescope were replaced and the readout of the two telescopes was upgraded. This paper (Part I) describes the details of the upgrade as well as the basic performance parameters of MAGIC such as raw data treatment, linearity in the electronic chain and sources of noise. In Part II, we describe the physics performance of the upgraded system.
© 2015 Elsevier B.V. Artículo firmado por 167 autores. We would like to thank the Instituto de Astrofísica de Canarias for the excellent working conditions at the Observatorio del Roque de los Muchachos in La Palma. The financial support of the German BMBF and MPG, the Italian INFN and INAF, the Swiss National Fund SNF, the ERDF under the Spanish MINECO, and the Japanese JSPS and MEXT is gratefully acknowledged. This work was also supported by the Centro de Excelencia Severo Ochoa SEV-2012-0234, CPAN CSD2007-00042, and MultiDark CSD2009-00064 projects of the Spanish Consolider-Ingenio 2010 programme, by grant 268740 of the Academy of Finland, by the Croatian Science Foundation (HrZZ) Project 09/176 and the University of Rijeka Project 184.108.40.206.02, by the DFG Collaborative Research Centers SFB823/C4 and SFB876/C3, and by the Polish MNiSzW grant 745/N-HESS-MAGIC/2010/0. We thank the two anonymous referees for thorough reading and helpful comments on the manuscript.
 F. Aharonian, A.G. Akhperjanian, A.R. Bazer-Bachi, et al., Observations of the Crab nebula with HESS, Astron. Astrophys., 457 (2006), pp. 899–915.  J. Holder, V.A. Acciari, E. Aliu, et al., Status of the VERITAS Observatory, in: F.A. Aharonian, W. Hofmann, F. Rieger (Eds.), American Institute of Physics Conference Series. vol. 1085 of American Institute of Physics Conference Series. 2008, pp. 657–660.  J. Hinton, Ground-based gamma-ray astronomy with Cherenkov telescopes, New J. Phys., 11 (2009), p. 055005.  E. Lorenz, R. Wagner. Very-high energy gamma-ray astronomy. A 23-year success story in high-energy astroparticle physics, Eur. Phys. J. H, 37 (2012), pp. 459–513.  A.M. Hillas, Cerenkov light images of EAS produced by primary gamma, Int. Cosmic Ray Conf., 3 (1985), pp. 445–448.  R. Zanin, et al., MARS, the MAGIC analysis and reconstruction software. In: International Cosmic Ray Conference, 2013.  E. Lorenz, Status of the 17 m MAGIC telescope, New A Rev., 48 (2004), pp. 339–344.  M. Doro, Reaching the lowest energy threshold of groundbased cherenkov telescopes with magicstereo: A goal achieved. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 692 (0) (2012) 201–207, 3rd Roma International Conference on Astroparticle Physics.  J. Aleksić, E.A. Álvarez, L.A. Antonelli, P. Antoranz, M. Asensio, et al., The major upgrade of the MAGIC telescopes, Part II: The achieved physics performance using the Crab Nebula observations, in press, http://dx.doi.org/10.1016/j.astropartphys.2015.02.005.  E. Aliu, H. Anderhub, L.A. Antonelli, P. Antoranz, M. Backes, et al., Observation of pulsed gamma-rays above 25 GeV from the crab pulsar with MAGIC Science, 322 (2008), pp. 1221–1224.  J. Rodríguez García, et al., Status of the new Sum-Trigger system for the MAGIC telescopes. In: 33rd International Cosmic Ray Conference of ICRC, Rio De Janeiro, 2013.  V.P. Fomin, A.A. Stepanian, R.C. Lamb, D.A. Lewis, M. Punch, T.C. Weekes, New methods of atmospheric Cherenkov imaging for gamma-ray astronomy I. the false source method, Astropart. Phys., 2 (1994), pp. 137–150.  H. Bartko, F. Goebel, R. Mirzoyan, W. Pimpl, M. Teshima, Tests of a prototype multiplexed fiber-optic ultra-fast FADC data acquisition system for the MAGIC telescope, Nucl. Instrum. Methods Phys. Res. A, 548 (2005), pp. 464–486.  D. Borla-Tridon, F. Goebel, D. Fink, et al., Performance of the Camera of the MAGIC II Telescope, in: 31st International Cosmic Ray Conference of ICRC, Lodz., 2009.  D. Tescaro, J. Aleksic, M. Barcelo, M. Bitossi, J. Cortina, M. Fras, D. Hadasch, J.M. Illa, M. Martínez, D. Mazin, R. Paoletti, R. Pegna, for the MAGIC Collaboration, The readout system of the MAGIC-II Cherenkov Telescope. In: 31st International Cosmic Ray Conference of ICRC, Lodz, Jul. 2009.  J. Sitarek, M. Gaug, D. Mazin, R. Paoletti, D. Tescaro, Analysis techniques and performance of the Domino Ring Sampler version 4 based readout for the MAGIC telescopes, Nucl. Instrum. Methods Phys. Res. A, 723 (2013), pp. 109–120.  M. Bitossi, R. Paoletti, D. Tescaro, Ultra-fast sampling and Data Acquisition using the DRS4 Waveform Digitizer, in preparation.  D. Tescaro, A. López-Oramas, A. Moralejo, D. Mazin, Daniela Hadasch for the MAGIC Collaboration, The MAGIC telescopes DAQ software and the on-the-fly online analysis client. In: 33rd ICRC, Rio De Janeiro. International Cosmic Ray Conference, Oct. 2013.  T. Schweizer, E. Lorenz, M. Martínez, A. Ostankov, D. Paneque, The optical calibration of the MAGIC telescope camera, IEEE Trans. Nuclear Sci., 49 (2002), pp. 2497–2503.  E. Aliu, H. Anderhub, L.A. Antonelli, P. Antoranz, M. Backes, et al., Improving the performance of the single-dish Cherenkov telescope MAGIC through the use of signal timing, Astropart. Phys., 30 (2009), pp. 293–305.  R. Mirzoyan, E. Lorenz, On the calibration accuracy of light sensors in atmospheric cherenkov fluorescence and neutrino experiments, Int. Cosmic Ray Conf., 7 (1997), p. 265.  E. Carmona, J.A. Coarasa, M. Barceló, for the MAGIC Collaboration, A Flexible High Demand Storage System for MAGIC-I and MAGIC-II using GFS. In: 31st International Cosmic Ray Conference of ICRC, Lodz., 2009.  I. Reichardt, J. Rico, E. Carmona, et al., The MAGIC Data Center, in: International Cosmic Ray Conference of 31st ICRC, Lodz, 2009.  A. Daum, G. Hermann, M. Heß, et al., First results on the performance of the HEGRA IACT array, Astropart. Phys., 8 (1997), pp. 1–11.  G. Giavitto, Observing the VHE Gamma-Ray Sky with the MAGIC Telescopes: the Blazar B3 2247+381 and the Crab Pulsar, 2013.  M. Doro, D. Bastieri, A. Biland, F. Dazzi, L. Font, et al., The reflective surface of the MAGIC telescope, Nucl. Instrum. Methods Phys. Res. A, 595 (2008), pp. 200–203.  A. Biland, M. Garczarczyk, H. Anderhub, et al., The Active Mirror Control of the MAGIC Telescopes, in: 30st International Cosmic Ray Conference of ICRC, Merida. vol. 3, 2008, pp. 1353–1356.  M. Garczarczyk, First Observations of the GRB Prompt and early afterglow emission phase at ∼ 100 GeV energy regime with the 17 m diameter MAGIC imaging atmospheric cherenkov telescope (Ph.D. thesis), University of Rostock, Germany, https://magicold.mpp.mpg.de/publications/theses/MGarczarczyk.pdf, 2006.  J. Aleksić, E.A. Álvarez, L.A. Antonelli, P. Antoranz, M. Asensio, et al., Performance of the MAGIC stereo system obtained with Crab Nebula data, Astropart. Phys., 35 (2012), pp. 435–448.  J. Albert, E. Aliu, H. Anderhub, et al., Implementation of the random forest method for the imaging atmospheric Cherenkov telescope MAGIC, Nucl. Instrum. Methods Phys. Res. A, 588 (2008), pp. 424–432.  B.S. Acharya, M. Actis, Aghajani, et al., Introducing the CTA concept, Astropart. Phys., 43 (2013), pp. 3–18.