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CERN Accelerating science

Article
Report number arXiv:2001.01643
Title Monitoring of the radio galaxy M87 during a low emission state from 2012 to 2015 with MAGIC
Author(s)

Acciari, V.A. (IAC, La Laguna) ; Ansoldi, S. (INFN, Trieste ; Udine U. ; Tokyo U., ICRR) ; Antonelli, L.A. (INAF, Rome) ; Engels, A. Arbet (Zurich, ETH) ; Arcaro, C. (Potchefstroom U. ; Padua Observ.) ; Baack, D. (Dortmund U.) ; Babić, A. (Boskovic Inst., Zagreb) ; Banerjee, B. (Saha Inst.) ; Bangale, P. (Munich, Max Planck Inst.) ; Barres de Almeida, U. (Rio de Janeiro, CBPF) ; Barrio, J.A. (HIAST ; Madrid U.) ; Becerra González, J. (IAC, La Laguna) ; Bednarek, W. (Lodz U.) ; Bellizzi, L. (INFN, Pisa ; Pisa U.) ; Bernardini, E. (DESY ; INFN, Padua) ; Berti, A. ; Besenrieder, J. (Munich, Max Planck Inst.) ; Bhattacharyya, W. (DESY) ; Bigongiari, C. (INAF, Rome) ; Biland, A. (Zurich, ETH) ; Blanch, O. (Barcelona, IFAE) ; Bonnoli, G. (INFN, Pisa ; Pisa U.) ; Bošnjak, Ž. (Boskovic Inst., Zagreb) ; Busetto, G. (INFN, Padua) ; Carosi, R. (INFN, Pisa ; Pisa U.) ; Ceribella, G. (Munich, Max Planck Inst.) ; Chai, Y. (Munich, Max Planck Inst.) ; Chilingaryan, A. ; Cikota, S. (Boskovic Inst., Zagreb) ; Colak, S.M. (Barcelona, IFAE) ; Colin, U. (Munich, Max Planck Inst.) ; Colombo, E. (IAC, La Laguna) ; Contreras, J.L. (HIAST ; Madrid U.) ; Cortina, J. (Madrid, CIEMAT) ; Covino, S. (INAF, Rome) ; D'Elia, V. (INAF, Rome) ; Da Vela, P. (INFN, Pisa ; Pisa U.) ; Dazzi, F. (INAF, Rome) ; De Angelis, A. (INFN, Padua) ; De Lotto, B. (INFN, Trieste ; Udine U.) ; Delfino, M. (Barcelona, IFAE ; Madrid, CIEMAT) ; Delgado, J. (Barcelona, IFAE ; Madrid, CIEMAT) ; Depaoli, D. ; Di Pierro, F. ; Di Venere, L. ; do Souto Espiñeira, Elia (Barcelona, IFAE) ; Dominis Prester, D. (Boskovic Inst., Zagreb) ; Donini, A. (INFN, Trieste ; Udine U.) ; Dorner, D. (Ruhr U., Astron. Inst.) ; Doro, M. (INFN, Padua) ; Elsaesser, D. (Dortmund U.) ; Fallah Ramazani, V. ; Fattorini, A. (Dortmund U.) ; Fernández-Barral, A. (INFN, Padua) ; Ferrara, G. (INAF, Rome) ; Fidalgo, D. (HIAST ; Madrid U.) ; Foffano, L. (INFN, Padua) ; Fonseca, M.V. (HIAST ; Madrid U.) ; Font, L. (Barcelona, Autonoma U.) ; Fruck, C. (Munich, Max Planck Inst.) ; Fukami, S. (Tokyo U., ICRR) ; López, R.J. García (IAC, La Laguna) ; Garczarczyk, M. (DESY) ; Gasparyan, S. ; Gaug, M. (Barcelona, Autonoma U.) ; Giglietto, N. ; Giordano, F. ; Godinović, N. (Boskovic Inst., Zagreb) ; Green, D. (Munich, Max Planck Inst.) ; Guberman, D. (Barcelona, IFAE) ; Hadasch, D. (Tokyo U., ICRR) ; Hahn, A. (Munich, Max Planck Inst.) ; Herrera, J. (IAC, La Laguna) ; Hoang, J. (HIAST ; Madrid U.) ; Hrupec, D. (Boskovic Inst., Zagreb) ; Hütten, M. (Munich, Max Planck Inst.) ; Inada, T. (Tokyo U., ICRR) ; Inoue, S. (Tokyo U., ICRR) ; Ishio, K. (Munich, Max Planck Inst.) ; Iwamura, Y. (Tokyo U., ICRR) ; Jouvin, L. (Barcelona, IFAE) ; Kerszberg, D. (Barcelona, IFAE) ; Kubo, H. (Tokyo U., ICRR) ; Kushida, J. (Tokyo U., ICRR) ; Lamastra, A. (INAF, Rome) ; Lelas, D. (Boskovic Inst., Zagreb) ; Leone, F. (INAF, Rome) ; Lindfors, E. ; Lombardi, S. (INAF, Rome) ; Longo, F. (INFN, Trieste ; Udine U. ; Trieste U.) ; López, M. (HIAST ; Madrid U.) ; López-Coto, R. (INFN, Padua) ; López-Oramas, A. (IAC, La Laguna) ; Loporchio, S. ; de Oliveira Fraga, B. Machado (Rio de Janeiro, CBPF) ; Maggio, C. (Barcelona, Autonoma U.) ; Majumdar, P. (Saha Inst.) ; Makariev, M. (Sofiya, Inst. Nucl. Res.) ; Mallamaci, M. (INFN, Padua) ; Maneva, G. (Sofiya, Inst. Nucl. Res.) ; Manganaro, M. (Boskovic Inst., Zagreb) ; Mannheim, K. (Ruhr U., Astron. Inst.) ; Maraschi, L. (INAF, Rome) ; Mariotti, M. (INFN, Padua) ; Martínez, M. (Barcelona, IFAE) ; Masuda, S. (Tokyo U., ICRR) ; Mazin, D. (Munich, Max Planck Inst. ; Tokyo U., ICRR) ; Mićanović, S. (Boskovic Inst., Zagreb) ; Miceli, D. (INFN, Trieste ; Udine U.) ; Minev, M. (Sofiya, Inst. Nucl. Res.) ; Miranda, J.M. (INFN, Pisa ; Pisa U.) ; Mirzoyan, R. (Munich, Max Planck Inst.) ; Molina, E. (Barcelona U.) ; Moralejo, A. (Barcelona, IFAE) ; Morcuende, D. (HIAST ; Madrid U.) ; Moreno, V. (Barcelona, Autonoma U.) ; Moretti, E. (Barcelona, IFAE) ; Munar-Adrover, P. (Barcelona, Autonoma U.) ; Neustroev, V. ; Nigro, C. (DESY) ; Nilsson, K. ; Ninci, D. (Barcelona, IFAE) ; Nishijima, K. (Tokyo U., ICRR) ; Noda, K. (Tokyo U., ICRR) ; Nogués, L. (Barcelona, IFAE) ; Nöthe, M. (Dortmund U.) ; Nozaki, S. (Tokyo U., ICRR) ; Paiano, S. (INFN, Padua) ; Palacio, J. (Barcelona, IFAE) ; Palatiello, M. (INFN, Trieste ; Udine U.) ; Paneque, D. (Munich, Max Planck Inst.) ; Paoletti, R. (INFN, Pisa ; Pisa U.) ; Paredes, J.M. (Barcelona U.) ; Peñil, P. (HIAST ; Madrid U.) ; Peresano, M. (INFN, Trieste ; Udine U.) ; Persic, M. (INFN, Trieste ; Udine U. ; U. Bologna, DIFA ; Trieste Observ.) ; Prada Moroni, P.G. (INFN, Pisa ; Pisa U.) ; Prandini, E. (INFN, Padua) ; Puljak, I. (Boskovic Inst., Zagreb) ; Rhode, W. (Dortmund U.) ; Ribó, M. (Barcelona U.) ; Rico, J. (Barcelona, IFAE) ; Righi, C. (INAF, Rome) ; Rugliancich, A. (INFN, Pisa ; Pisa U.) ; Saha, L. (HIAST ; Madrid U.) ; Sahakyan, N. ; Saito, T. (Tokyo U., ICRR) ; Sakurai, S. (Tokyo U., ICRR) ; Satalecka, K. (DESY) ; Schmidt, K. (Dortmund U.) ; Schweizer, T. (Munich, Max Planck Inst.) ; Sitarek, J. (Lodz U.) ; Šnidarić, I. (Boskovic Inst., Zagreb) ; Sobczynska, D. (Lodz U.) ; Somero, A. (IAC, La Laguna) ; Stamerra, A. (INAF, Rome) ; Strom, D. (Munich, Max Planck Inst.) ; Strzys, M. (Munich, Max Planck Inst.) ; Suda, Y. (Munich, Max Planck Inst.) ; Surić, T. (Boskovic Inst., Zagreb) ; Takahashi, M. (Tokyo U., ICRR) ; Tavecchio, F. (INAF, Rome) ; Temnikov, P. (Sofiya, Inst. Nucl. Res.) ; Terzić, T. (Boskovic Inst., Zagreb) ; Teshima, M. (Munich, Max Planck Inst. ; Tokyo U., ICRR) ; Torres-Albà, N. (Barcelona U.) ; Tosti, L. ; Tsujimoto, S. (Tokyo U., ICRR) ; Vagelli, V. ; van Scherpenberg, J. (Munich, Max Planck Inst.) ; Vanzo, G. (IAC, La Laguna) ; Vazquez Acosta, M. (IAC, La Laguna) ; Vigorito, C.F. ; Vitale, V. ; Vovk, I. (Munich, Max Planck Inst.) ; Will, M. (Munich, Max Planck Inst.) ; Zarić, D. (Boskovic Inst., Zagreb) ; Collaborators, MWL (Tokyo U., ICRR) ; Asano, K. (Tokyo U., ICRR) ; Hada, K. (Natl. Astron. Observ. of Japan ; Tokyo, Grad. U. Adv. Stud.) ; Harris, D.E. (Harvard-Smithsonian Ctr. Astrophys.) ; Giroletti, M. (INAF-IRA, Bologna) ; Jermak, H.E. (Liverpool John Moores U., ARI) ; Madrid, J.P. (Texas U., Brownsville, CGWA) ; Massaro, F. (Turin U. ; INFN, Turin ; OATo, Turin ; CIFS, Turin) ; Richter, S. (Potchefstroom U.) ; Spanier, F. (Potchefstroom U. ; Heidelberg U.) ; Steele, I.A. (Liverpool John Moores U., ARI) ; Walker, R.C. (NRAO, Socorro)

Publication 2020-03-11
Imprint 2020-01-06
Number of pages 12
Note 12 pages, 4 figures, Published on MNRAS. Corresponding authors (alphabetical ordered): C. Arcaro, P. Bangale, M. Manganaro, D. Mazin
In: Mon. Not. R. Astron. Soc. 492 (2020) 5354-5365
DOI 10.1093/mnras/staa014 (publication)
Subject category astro-ph.HE ; Astrophysics and Astronomy
Accelerator/Facility, Experiment MAGIC
Abstract M87 is one of the closest (z=0.00436) extragalactic sources emitting at very-high-energies (VHE, E > 100 GeV). The aim of this work is to locate the region of the VHE gamma-ray emission and to describe the observed broadband spectral energy distribution (SED) during the low VHE gamma-ray state. The data from M87 collected between 2012 and 2015 as part of a MAGIC monitoring programme are analysed and combined with multi-wavelength data from Fermi-LAT, Chandra, HST, EVN, VLBA and the Liverpool Telescope. The averaged VHE gamma-ray spectrum can be fitted from 100GeV to 10TeV with a simple power law with a photon index of (-2.41 $\pm$ 0.07), while the integral flux above 300GeV is $(1.44 \pm 0.13) \times 10^{-12} cm^{-2} s^{-1}$. During the campaign between 2012 and 2015, M87 is generally found in a low emission state at all observed wavelengths. The VHE gamma-ray flux from the present 2012-2015 M87 campaign is consistent with a constant flux with some hint of variability ($\sim3\sigma$) on a daily timescale in 2013. The low-state gamma-ray emission likely originates from the same region as the flare-state emission. Given the broadband SED, both a leptonic synchrotron self Compton and a hybrid photo-hadronic model reproduce the available data well, even if the latter is preferred. We note, however, that the energy stored in the magnetic field in the leptonic scenario is very low suggesting a matter dominated emission region.
Copyright/License publication: © 2020-2024 The Author(s) (License: OUP Standard Journals Publication Model)
preprint: © 2019-2024 The Author(s) (License: arXiv nonexclusive-distrib 1.0)



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