Search for very high-energy gamma-ray emission from the microquasar Cygnus X-1 with the MAGIC telescopes
- MAGIC Collaboration
- Ahnen, M. L.
- González, J. Becerra
- Palacio, J.
- Paneque, D.
- Paoletti, R.
- Paredes, J. M.
- Paredes-Fortuny, X.
- Pedaletti, G.
- Peresano, M.
- Perri, L.
- Persic, M.
- Moroni, P. G. Prada
- Bednarek, W.
- Prandini, E.
- Puljak, I.
- Garcia, J. R.
- Reichardt, I.
- Rhode, W.
- Ribó, M.
- Rico, J.
- Righi, C.
- Saito, T.
- Satalecka, K.
- Bernardini, E.
- Schroeder, S.
- Schweizer, T.
- Sitarek, J.
- Šnidarić, I.
- Sobczynska, D.
- Stamerra, A.
- Strzys, M.
- Surić, T.
- Takalo, L.
- Tavecchio, F.
- Berti, A.
- Temnikov, P.
- Terzić, T.
- Tescaro, D.
- Teshima, M.
- Torres, D. F.
- Torres-Albà, N.
- Treves, A.
- Vanzo, G.
- Acosta, M. Vazquez
- Vovk, I.
- Bhattacharyya, W.
- Ward, J. E.
- Will, M.
- Zarić, D.
- Bosch-Ramon, V.
- Pooley, G. G.
- Trushkin, S. A.
- Zanin, R.
- Biasuzzi, B.
- Biland, A.
- Blanch, O.
- Bonnefoy, S.
- Bonnoli, G.
- Ansoldi, S.
- Carosi, R.
- Carosi, A.
- Chatterjee, A.
- Colin, P.
- Colombo, E.
- Contreras, J. L.
- Cortina, J.
- Covino, S.
- Cumani, P.
- Da Vela, P.
- Antonelli, L. A.
- Dazzi, F.
- De Angelis, A.
- De Lotto, B.
- Wilhelmi, E. de Oña
- Di Pierro, F.
- Doert, M.
- Domínguez, A.
- Prester, D. Dominis
- Dorner, D.
- Doro, M.
- Arcaro, C.
- Einecke, S.
- Glawion, D. Eisenacher
- Elsaesser, D.
- Engelkemeier, M.
- Ramazani, V. Fallah
- Fernández-Barral, A.
- Fidalgo, D.
- Fonseca, M. V.
- Font, L.
- Fruck, C.
- Babić, A.
- Galindo, D.
- López, R. J. García
- Garczarczyk, M.
- Gaug, M.
- Giammaria, P.
- Godinović, N.
- Gora, D.
- Guberman, D.
- Hadasch, D.
- Hahn, A.
- Banerjee, B.
- Hassan, T.
- Hayashida, M.
- Herrera, J.
- Hose, J.
- Hrupec, D.
- Ishio, K.
- Konno, Y.
- Kubo, H.
- Kushida, J.
- Kuveždić, D.
- Bangale, P.
- Lelas, D.
- Lindfors, E.
- Lombardi, S.
- Longo, F.
- López, M.
- Maggio, C.
- Majumdar, P.
- Makariev, M.
- Maneva, G.
- Manganaro, M.
- de Almeida, U. Barres
- Mannheim, K.
- Maraschi, L.
- Mariotti, M.
- Martínez, M.
- Mazin, D.
- Menzel, U.
- Minev, M.
- Mirzoyan, R.
- Moralejo, A.
- Moreno, V.
- Barrio, J. A.
- Moretti, E.
- Neustroev, V.
- Niedzwiecki, A.
- Rosillo, M. Nievas
- Nilsson, K.
- Ninci, D.
- Nishijima, K.
- Noda, K.
- Nogués, L.
- Paiano, S.
DOIAbstract
The microquasar Cygnus X-1 displays the two typical soft and hard X-ray states of a black-hole transient. During the latter, Cygnus X-1 shows a one-sided relativistic radio-jet. Recent detection of the system in the high energy (HE; $E\gtrsim60$ MeV) gamma-ray range with \textit{Fermi}-LAT associates this emission with the outflow. Former MAGIC observations revealed a hint of flaring activity in the very high-energy (VHE; $E\gtrsim100$ GeV) regime during this X-ray state. We analyze $\sim97$ hr of Cygnus X-1 data taken with the MAGIC telescopes between July 2007 and October 2014. To shed light on the correlation between hard X-ray and VHE gamma rays as previously suggested, we study each main X-ray state separately. We perform an orbital ph...
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