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@ARTICLE{Ahnen:399131,
      author       = {Ahnen, M. L. and Ansoldi, S. and Antonelli, L. A. and
                      Arcaro, C. and Babić, A. and Banerjee, B. and Bangale, P.
                      and Barres de Almeida, U. and Barrio, J. A. and Becerra
                      González, J. and Bednarek, W. and Bernardini, E. and Berti,
                      A. and Bhattacharyya, W. and Biasuzzi, B. and Biland, A. and
                      Blanch, O. and Bonnefoy, S. and Bonnoli, G. and Carosi, R.
                      and Carosi, A. and Chatterjee, A. and Colak, M. and Colin,
                      P. and Colombo, E. and Contreras, J. L. and Cortina, J. and
                      Covino, S. and Cumani, P. and Da Vela, P. and Dazzi, F. and
                      De Angelis, A. and De Lotto, B. and de Oña Wilhelmi, E. and
                      Di Pierro, F. and Doert, M. and Domínguez, A. and Dominis
                      Prester, D. and Dorner, D. and Doro, M. and Einecke, S. and
                      Eisenacher Glawion, D. and Elsaesser, D. and Engelkemeier,
                      M. and Fallah Ramazani, V. and Fernández-Barral, A. and
                      Fidalgo, D. and Fonseca, M. V. and Font, L. and Fruck, C.
                      and Galindo, D. and García López, R. J. and Garczarczyk,
                      Markus and Gaug, M. and Giammaria, P. and Godinović, N. and
                      Gora, D. and Guberman, D. and Hadasch, D. and Hahn, A. and
                      Hassan, T. and Hayashida, M. and Herrera, J. and Hose, J.
                      and Hrupec, D. and Inada, T. and Ishio, K. and Konno, Y. and
                      Kubo, H. and Kushida, J. and Kuveždić, D. and Lelas, D.
                      and Lindfors, E. and Lombardi, S. and Longo, F. and López,
                      M. and Maggio, C. and Majumdar, P. and Makariev, M. and
                      Maneva, G. and Manganaro, M. and Mannheim, K. and Maraschi,
                      L. and Mariotti, M. and Martínez, M. and Mazin, D. and
                      Menzel, U. and Minev, M. and Mirzoyan, R. and Moralejo, A.
                      and Moreno, V. and Moretti, E. and Neustroev, V. and
                      Niedzwiecki, A. and Nievas Rosillo, M. and Nilsson, K. and
                      Ninci, D. and Nishijima, K. and Noda, K. and Nogués, L. and
                      Paiano, S. and Palacio, J. and Paneque, D. and Paoletti, R.
                      and Paredes, J. M. and Pedaletti, G. and Peresano, M. and
                      Perri, L. and Persic, M. and Prada Moroni, P. G. and
                      Prandini, E. and Puljak, I. and Garcia, J. R. and Reichardt,
                      I. and Rhode, W. and Ribó, M. and Rico, J. and Righi, C.
                      and Saito, T. and Satalecka, K. and Schroeder, S. and
                      Schweizer, T. and Shore, S. N. and Sitarek, J. and
                      Šnidarić, I. and Sobczynska, D. and Stamerra, A. and
                      Strzys, M. and Surić, T. and Takalo, L. and Tavecchio, F.
                      and Temnikov, P. and Terzić, T. and Tescaro, D. and
                      Teshima, M. and Torres-Albà, N. and Treves, A. and Vanzo,
                      G. and Vazquez Acosta, M. and Vovk, I. and Ward, J. E. and
                      Will, M. and Zarić, D.},
      collaboration = {{MAGIC Collaboration}},
      title        = {{A} cut-off in the {T}e{V} gamma-ray spectrum of the {SNR}
                      {C}assiopeia {A}},
      journal      = {Monthly notices of the Royal Astronomical Society},
      volume       = {472},
      number       = {3},
      issn         = {1365-2966},
      address      = {Oxford},
      publisher    = {Oxford Univ. Press},
      reportid     = {PUBDB-2018-00436, arXiv:1707.01583},
      pages        = {2956 - 2962},
      year         = {2017},
      note         = {(c) The Authors},
      abstract     = {It is widely believed that the bulk of the Galactic cosmic
                      rays is accelerated in supernova remnants (SNRs). However,
                      no observational evidence of the presence of particles of
                      PeV energies in SNRs has yet been found. The young
                      historical SNR Cassiopeia A (Cas A) appears as one of the
                      best candidates to study acceleration processes. Between
                      2014 December and 2016 October, we observed Cas A with the
                      MAGIC telescopes, accumulating 158 h of good quality data.
                      We derived the spectrum of the source from 100 GeV to 10
                      TeV. We also analysed ∼8 yr of Fermi-LAT to obtain the
                      spectral shape between 60 MeV and 500 GeV. The spectra
                      measured by the LAT and MAGIC telescopes are compatible
                      within the errors and show a clear turn-off (4.6σ) at the
                      highest energies, which can be described with an exponential
                      cut-off at $E_c = 3.5(^{+1.6}_{-1.0})_{{\rm stat}}
                      (^{+0.8}_{-0.9})_{{\rm sys}}$ TeV. The gamma-ray emission
                      from 60 MeV to 10 TeV can be attributed to a population of
                      high-energy protons with a spectral index of ∼2.2 and an
                      energy cut-off at ∼10 TeV. This result indicates that Cas
                      A is not contributing to the high energy (∼PeV) cosmic ray
                      sea in a significant manner at the present moment. A
                      one-zone leptonic model fails to reproduce by itself the
                      multiwavelength spectral energy distribution. Besides, if a
                      non-negligible fraction of the flux seen by MAGIC is
                      produced by leptons, the radiation should be emitted in a
                      region with a low magnetic field (B⪅180 μG) like in the
                      reverse shock.},
      keywords     = {energy: high (INSPIRE) / gamma ray: emission (INSPIRE) /
                      gamma ray: energy spectrum (INSPIRE) / cosmic radiation:
                      galaxy (INSPIRE) / magnetic field: low (INSPIRE) / model:
                      leptonic (INSPIRE) / MAGIC (INSPIRE) / spectral (INSPIRE) /
                      p (INSPIRE) / power spectrum (INSPIRE) / acceleration
                      (INSPIRE) / supernova (INSPIRE) / lepton (INSPIRE) / moment
                      (INSPIRE) / flux (INSPIRE) / GLAST (INSPIRE) / energy
                      spectrum (INSPIRE)},
      cin          = {ZEU-EXP/AT},
      ddc          = {520},
      cid          = {$I:(DE-H253)ZEU-EXP_AT-20120731$},
      pnm          = {613 - Matter and Radiation from the Universe (POF3-613)},
      pid          = {G:(DE-HGF)POF3-613},
      experiment   = {EXP:(DE-H253)MAGIC-20170101},
      typ          = {PUB:(DE-HGF)29 / PUB:(DE-HGF)16},
      eprint       = {1707.01583},
      howpublished = {arXiv:1707.01583},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:1707.01583;\%\%$},
      UT           = {WOS:000413088400041},
      doi          = {10.1093/mnras/stx2079},
      url          = {https://bib-pubdb1.desy.de/record/399131},
}