The blazar TXS 0506+056 associated with a high-energy neutrino: insights into extragalactic jets and cosmic ray acceleration
- Ansoldi, S.
- Antonelli, L.
- Arcaro, C.
- Baack, D.
- Babić, A.
- Banerjee, B.
- Bangale, P.
- Barres de Almeida, U.
- Barrio, J.
- Becerra González, J.
- Bednarek, W.
- Bernardini, E.
- Berse, R.
- Berti, A.
- Besenrieder, J.
- Bhattacharyya, W.
- Bigongiari, C.
- Biland, A.
- Blanch, O.
- Bonnoli, G.
- Carosi, R.
- Ceribella, G.
- Chatterjee, A.
- Colak, S.
- Colin, P.
- Colombo, E.
- Contreras, J.
- Cortina, J.
- Covino, S.
- Cumani, P.
- D'Elia, V.
- Da Vela, P.
- Dazzi, F.
- De Angelis, A.
- De Lotto, B.
- Delfino, M.
- Delgado, J.
- Di Pierro, F.
- Domínguez, A.
- Dominis Prester, D.
- Dorner, D.
- Doro, M.
- Einecke, S.
- Elsaesser, D.
- Fallah Ramazani, V.
- Fattorini, A.
- Fernández-Barral, A.
- Ferrara, G.
- Fidalgo, D.
- Foffano, L.
- Fonseca, M.
- Font, L.
- Fruck, C.
- Gallozzi, S.
- García López, R.
- Garczarczyk, M.
- Gaug, M.
- Giammaria, P.
- Godinović, N.
- Guberman, D.
- Hadasch, D.
- Hahn, A.
- Hassan, T.
- Hayashida, M.
- Herrera, J.
- Hoang, J.
- Hrupec, D.
- Inoue, S.
- Ishio, K.
- Iwamura, Y.
- Konno, Y.
- Kubo, H.
- Kushida, J.
- Lamastra, A.
- Lelas, D.
- Leone, F.
- Lindfors, E.
- Lombardi, S.
- Longo, F.
- López, M.
- Maggio, C.
- Majumdar, P.
- Makariev, M.
- Maneva, G.
- Manganaro, M.
- Mannheim, K.
- Maraschi, L.
- Mariotti, M.
- Martínez, M.
- Masuda, S.
- Mazin, D.
- Mielke, K.
- Minev, M.
- Miranda, J.
- Mirzoyan, R.
- Moralejo, A.
- Moreno, V.
- Moretti, E.
- Neustroev, V.
- Niedzwiecki, A.
- Nievas Rosillo, M.
- Nigro, C.
- Nilsson, K.
- Ninci, D.
- Nishijima, K.
- Noda, K.
- Nogués, L.
- Paiano, S.
- Palacio, J.
- Paneque, D.
- Paoletti, R.
- Paredes, J.
- Pedaletti, G.
- Peñil, P.
- Peresano, M.
- Persic, M.
- Pfrang, K.
- Prada Moroni, P.
- Prandini, E.
- Puljak, I.
- Garcia, J.
- Rhode, W.
- Ribó, M.
- Rico, J.
- Righi, C.
- Rugliancich, A.
- Saha, L.
- Saito, T.
- Satalecka, K.
- Schweizer, T.
- Sitarek, J.
- Šnidarić, I.
- Sobczynska, D.
- Stamerra, A.
- Strzys, M.
- Surić, T.
- Tavecchio, F.
- Temnikov, P.
- Terzić, T.
- Teshima, M.
- Torres-Albà, N.
- Tsujimoto, S.
- Vanzo, G.
- Vazquez Acosta, M.
- Vovk, I.
- Ward, J.
- Will, M.
- Zarić, D.
- Cerruti, M.
DOIAbstract
A neutrino with energy of $\sim$290 TeV, IceCube-170922A, was detected in coincidence with the BL Lac object TXS~0506+056 during enhanced gamma-ray activity, with chance coincidence being rejected at $\sim 3\sigma$ level. We monitored the object in the very-high-energy (VHE) band with the MAGIC telescopes for $\sim$41 hours from 1.3 to 40.4 days after the neutrino detection. Day-timescale variability is clearly resolved. We interpret the quasi-simultaneous neutrino and broadband electromagnetic observations with a novel one-zone lepto-hadronic model, based on interactions of electrons and protons co-accelerated in the jet with external photons originating from a slow-moving plasma sheath surrounding the faster jet spine. We can reproduce th...
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