The broadband 3-year monitoring of the blazar 1ES 1959+650: a SED analysis of the low state

Nanci, C.; Nigro, C.; Arcaro, C.; Prandini, E.; Dorner, D.; Zanin, R.; Arbet-Engels, A.; Rosillo, M. N.; D'Ammando, F.; Bronzini, E.; Sakurai, S.; Abe, H.; Abe, S.; Abhir, J.; Acciari, V. A.; Agudo, I.; Aniello, T.; Ansoldi, S.; Antonelli, L. A.; Arbet Engels, A.; Arcaro, C.; Artero, M.; Asano, K.; Baack, D.; Babic, A.; Baquero, A.; de Almeida, U. B.; Barrio, J. A.; Batkovic, I.; Baxter, J.; Becerra Gonzalez, J.; Bednarek, W.; Bernardini, E.; Bernardos, M.; Bernete, J.; Berti, A.; Besenrieder, J.; Bigongiari, C.; Biland, A.; Blanch, O.; Bonnoli, G.; Bosnjak, Z.; Bronzini, E.; Burelli, I.; Busetto, G.; Campoy-Ordaz, A.; Carosi, A.; Carosi, R.; Carretero-Castrillo, M.; Castro-Tirado, A. J.; Ceribella, G.; Chai, Y.; Chilingarian, A.; Cifuentes, A.; Cikota, S.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; D'Amico, G.; D'Ammando, F.; D'Elia, V.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Lotto, B.; Del Popolo, A.; Delfino, M.; Delgado, J.; Delgado Mendez, C.; Depaoli, D.; Di Pierro, F.; Di Venere, L.; Dominis Prester, D.; Donini, A.; Dorner, D.; Doro, M.; Elsaesser, D.; Emery, G.; Escudero, J.; Farina, L.; Fattorini, A.; Foffano, L.; Font, L.; Frose, S.; Fukami, S.; Fukazawa, Y.; Garcia Lopez, R. J.; Garczarczyk, M.; Gasparyan, S.; Gaug, M.; Giesbrecht Paiva, J. G.; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinovic, N.; Grau, R.; Green, D.; Green, J. G.; Hadasch, D.; Hahn, A.; Hassan, T.; Heckmann, L.; Herrera, J.; Hrupec, D.; Hutten, M.; Imazawa, R.; Inada, T.; Iotov, R.; Ishio, K.; Jimenez Martinez, I.; Jormanainen, J.; Kerszberg, D.; Kluge, G. W.; Kobayashi, Y.; Kouch, P. M.; Kubo, H.; Kushida, J.; Lainez Lezaun, M.; Lamastra, A.; Lelas, D.; Leone, F.; Lindfors, E.; Linhoff, L.; Lombardi, S.; Longo, F.; Lopez-Coto, R.; Lopez-Moya, M.; Lopez-Oramas, A.; Loporchio, S.; Lorini, A.; Lyard, E.; Machado de Oliveira Fraga, B.; Majumdar, P.; Makariev, M.; Maneva, G.; Mang, N.; Manganaro, M.; Mangano, S.; Mannheim, K.; Mariotti, M.; Martinez, M.; Martinezchicharro, M.; Mas-Aguilar, A.; Mazin, D.; Menchiari, S.; Mender, S.; Micanovic, S.; Miceli, D.; Miener, T.; Miranda, J. M.; Mirzoyan, R.; Molero Gonzalez, M.; Molina, E.; Mondal, H. A.; Moralejo, A.; Morcuende, D.; Nakamori, T.; Nanci, C.; Nava, L.; Neustroev, V.; Nickel, L.; Nievas Rosillo, M.; Nigro, C.; Nikolic, L.; Nilsson, K.; Nishijima, K.; Njoh Ekoume, T.; Noda, K.; Nozaki, S.; Ohtani, Y.; Oka, T.; Okumura, A.; Otero-Santos, J.; Paiano, S.; Palatiello, M.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pavletic, L.; Pavlovic, D.; Persic, M.; Pihet, M.; Pirola, G.; Podobnik, F.; Prada Moroni, P. G.; Prandini, E.; Principe, G.; Priyadarshi, C.; Rhode, W.; Ribo, M.; Rico, J.; Righi, C.; Sahakyan, N.; Saito, T.; Sakurai, S.; Satalecka, K.; Saturni, F. G.; Schleicher, B.; Schmidt, K.; Schmuckermaier, F.; Schubert, J. L.; Schweizer, T.; Sciaccaluga, A.; Sitarek, J.; Sliusar, V.; Sobczynska, D.; Spolon, A.; Stamerra, A.; Striskovic, J.; Strom, D.; Strzys, M.; Suda, Y.; Suric, T.; Suutarinen, S.; Tajima, H.; Takahashi, M.; Takeishi, R.; Tavecchio, F.; Temnikov, P.; Terauchi, K.; Terzic, T.; Teshima, M.; Tosti, L.; Truzzi, S.; Tutone, A.; Ubach, S.; van Scherpenberg, J.; Vazquez Acosta, M.; Ventura, S.; Verguilov, V.; Viale, I.; Vigorito, C. F.; Vitale, V.; Vovk, I.; Walter, R.; Will, M.; Wunderlich, C.; Yamamoto, T.; Zanin, R.; Hovatta, T.; Kiehlmann, S.; Readhead, A. C. S.; Kadler, M.; Benke, P.; Eppel, F.; Gokus, A.; Hammerich, S.; Hessdorfer, J.; Kirchner, D.; Paraschos, G. F.; Rosch, F.; Sinapius, J.; Weber, P.

Blazars' Spectral Energy Distribution (SED) consists of two components. In a leptonic interpretation, the low-energy bump is due to synchrotron radiation from accelerated electrons while the high-energy one is produced via inverse Compton scattering of the electrons by lower-energy photons. These come from the synchrotron radiation produced by the same population of electrons emitting at low energy (Synchrotron Self-Compton, SSC, scenario) or from an external photon field. According to hadronic models, the high-energy emission is due to processes involving the protons in the source. Multiwavelength (MWL) long-term monitoring of blazars is key since the SED modelling over time allows the study of the radiative processes during different source states. The blazar 1ES 1959+650 represents an ideal laboratory for that, being bright at all wavelengths and located at low redshift (z=0.047) allowing its detection up to TeV energies. Also, it underwent some flaring episodes in the past. Long-term monitoring of 1ES 1959+650 is ongoing under the coordination of the MAGIC Collaboration. During the last years, the source is experiencing its lowest state ever reached, mainly at very high energies (VHE; E > 100 GeV). This contribution presents the MAGIC+MWL observations of the last 3 years, and the preliminary study focusing on an SSC interpretation of the data.