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Hadasch, D. Hildebr, D. Hrupec, D. Lelas, D. Mazin, D. Nakajima, D. Paneque, D. Sobczynska, D. Tescaro, E. Bernardini, E. Carmona, E. Colombo, E. de O\\~na Wilhelmi, E. Lindfors, E. Lorenz, E. Pr, F. Borracci, F. Dazzi, F. Longo, F. Spanier, F. Tavecchio, G. Bonnoli, G. De Caneva, G. Maneva, H. Kellermann, H. Kubo, H. Takami, I. Lozano, ini, I. Puljak, I. Snidaric, J. A. Barrio, J. Aleksi\\'c, J. Becerra Gonz\\'alez, J. Casares, J. Cortina, J. Herrera, J. Hose, J. Krause, J. Kushida, J. L. Contreras, J. M. Mir, J. Mold\\'on, J. M. Paredes, J. Poutanen, J. Rico, J. Rodriguez Garcia, J. Sitarek, J. Storz, J. Thaele, K. Frantzen, K. Kodani, K. Mallot, K. Mannheim, K. Nilsson, K. Nishijima, K. Noda, K. Saito, K. Satalecka, L. A. Antonelli, L. Font, L. Maraschi, L. Takalo, M. Doro, M. Garczarczyk, M. Gaug, M. Hayashida, M. L. Knoetig, M. L\\'opez, M. Makariev, M. Mariotti, M. Mart\\'inez, M. Palatiello, M. Persic, M. Rib\\'o, M. Strzys, M. Teshima, M. V. Fonseca, M. Will, N. Godinovi\\'c, N. Lewandowska, N. Mankuzhiyil, O. Blanch, O. Tibolla, P. Antoranz, P. Bangale, P. Colin, P. Da Vela, P. G. Prada Moroni, P. Munar-Adrover, P. Temnikov, P. Vogler, R. J. Garc\\'ia L\\'opez, R. L\\'opez-Coto, R. Mirzoyan, R. Orito, R. Paoletti, R. Reinthal, R. Zanin, S. Ansoldi, S. Bonnefoy, S. Covino, S. Einecke, S. Lombardi, S. Paiano, S. R. Gozzini, S. R\\\"ugamer, T. Bretz, (the MAGIC Collaboration), T. Saito, T. Schweizer, T. Steinbring, T. Terzi\\'c, T. Toyama, U. Menzel, V. Kadenius, V. Neustroev, V. Scalzotto, V. Scapin, W. Bednarek, W. Idec, W. Rhode, X. Paredes-Fortuny, Y. Hanabata, Y. Konno","submitted_at":"2015-02-05T13:16:58Z","abstract_excerpt":"Context: MWC 656 has recently been established as the first observationally detected high-mass X-ray binary system containing a Be star and a black hole (BH). The system has been associated with a gamma-ray flaring event detected by the AGILE satellite in July 2010. Aims: Our aim is to evaluate if the MWC 656 gamma-ray emission extends to very high energy (VHE > 100 GeV) gamma rays. Methods. We have observed MWC 656 with the MAGIC telescopes for $\\sim$23 hours during two observation periods: between May and June 2012 and June 2013. 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Babic, A. Bil, A. Carosi, A. De Angelis, A. Gonz\\'alez Mu\\~noz, A. La Barbera, A. L\\'opez-Oramas, A. Moralejo, A. Niedzwiecki, A. Overkemping, A. Sillanp\\\"a\\\"a, A. Stamerra, A. Treves, B. Biasuzzi, B. De Lotto, B. Marcote, C. Delgado Mendez, C. Fruck, C. Schultz, D. Dominis Prester, D. Dorner, D. Eisenacher, D. Elsaesser, D. Fidalgo, D. F. Torres, D. Galindo, D. Garrido Terrats, D. Hadasch, D. Hildebr, D. Hrupec, D. Lelas, D. Mazin, D. Nakajima, D. Paneque, D. Sobczynska, D. Tescaro, E. Bernardini, E. Carmona, E. Colombo, E. de O\\~na Wilhelmi, E. Lindfors, E. Lorenz, E. Pr, F. Borracci, F. Dazzi, F. Longo, F. Spanier, F. Tavecchio, G. Bonnoli, G. De Caneva, G. Maneva, H. Kellermann, H. Kubo, H. Takami, I. Lozano, ini, I. Puljak, I. Snidaric, J. A. Barrio, J. Aleksi\\'c, J. Becerra Gonz\\'alez, J. Casares, J. Cortina, J. Herrera, J. Hose, J. Krause, J. Kushida, J. L. Contreras, J. M. Mir, J. Mold\\'on, J. M. Paredes, J. Poutanen, J. Rico, J. Rodriguez Garcia, J. Sitarek, J. Storz, J. Thaele, K. Frantzen, K. Kodani, K. Mallot, K. Mannheim, K. Nilsson, K. Nishijima, K. Noda, K. Saito, K. Satalecka, L. A. Antonelli, L. Font, L. Maraschi, L. Takalo, M. Doro, M. Garczarczyk, M. Gaug, M. Hayashida, M. L. Knoetig, M. L\\'opez, M. Makariev, M. Mariotti, M. Mart\\'inez, M. Palatiello, M. Persic, M. Rib\\'o, M. Strzys, M. Teshima, M. V. Fonseca, M. Will, N. Godinovi\\'c, N. Lewandowska, N. Mankuzhiyil, O. Blanch, O. Tibolla, P. Antoranz, P. Bangale, P. Colin, P. Da Vela, P. G. Prada Moroni, P. Munar-Adrover, P. Temnikov, P. Vogler, R. J. Garc\\'ia L\\'opez, R. L\\'opez-Coto, R. Mirzoyan, R. Orito, R. Paoletti, R. Reinthal, R. Zanin, S. Ansoldi, S. Bonnefoy, S. Covino, S. Einecke, S. Lombardi, S. Paiano, S. R. Gozzini, S. R\\\"ugamer, T. Bretz, (the MAGIC Collaboration), T. Saito, T. Schweizer, T. Steinbring, T. Terzi\\'c, T. Toyama, U. Menzel, V. Kadenius, V. Neustroev, V. Scalzotto, V. Scapin, W. Bednarek, W. Idec, W. Rhode, X. Paredes-Fortuny, Y. Hanabata, Y. 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