First multi-wavelength campaign on the gamma-ray-loud active galaxy IC 310

Ahnen ML, Ansoldi S, Antonelli LA, Arcaro C, Babic A, Banerjee B, Bangale P, De Almeida UB, Barrio JA, Becerra Gonzalez J, Bednarek W, Bernardini E, Berti A, Biasuzzi B, Biland A, Blanch O, Bonnefoy S, Bonnoli G, Borracci F, Bretz T, Carosi R, Carosi A, Chatterjee A, Colin P, Colombo E, Contreras JL, Cortina J, Covino S, Cumani P, Da Vela P, Dazzi F, De Angelis A, De Lotto B, De Ona Wilhelmi E, Di Pierro F, Doert M, Dominguez A, Prester DD, Dorner D, Doro M, Einecke S, Glawion DE, Elsaesser D, Engelkemeier M, Ramazani VF, Fernandez-Barral A, Fidalgo D, Fonseca MV, Font L, Fruck C, Galindo D, Lopez RJG, Garczarczyk M, Gaug M, Giammaria P, Godinovic N, Gora D, Guberman D, Hadasch D, Hahn A, Hassan T, Hayashida M, Herrera J, Hose J, Hrupec D, Hughes G, Idec W, Ishio K, Kodani K, Konno Y, Kubo H, Kushida J, Lelas D, Lindfors E, Lombardi S, Longo F, Lopez M, Majumdar P, Makariev M, Mallot K, Maneva G, Manganaro M, Mannheim K, Maraschi L, Mariotti M, Martinez M, Mazin D, Menzel U, Mirzoyan R, Moralejo A, Moretti E, Nakajima D, Neustroev V, Niedzwiecki A, Rosillo MN, Nilsson K, Nishijima K, Noda K, Nogues L, Nothe M, Paiano S, Palacio J, Palatiello M, Paneque D, Paoletti R, Paredes JM, Paredes-Fortuny X, Pedaletti G, Peresano M, Perri L, Persic M, Poutanen J, Moroni PGP, Prandini E, Puljak I, Garcia JR, Reichardt I, Rhode W, Ribo M, Rico J, Saito T, Satalecka K, Schroeder S, Schweizer T, Shore SN, Sillanpaa A, Sitarek J, Snidaric I, Sobczynska D, Stamerra A, Strzys M, Suric T, Takalo L, Tavecchio F, Temnikov P, Terzic T, Tescaro D, Teshima M, Torres DF, Torres-Alba N, Toyama T, Treves A, Vanzo G, Vazquez Acosta M, Vovk I, Ward JE, Will M, Wu MH, Krauss F, Schulz R, Kadler M, Wilms J, Ros E, Bach U, Beuchert T, Langejahn M, Wendel C, Gehrels N, Baumgartner WH, Markwardt CB, Muller C, Grinberg V, Hovatta T, Magill J (2017)


Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Publisher: EDP SCIENCES S A

Book Volume: 603

Article Number: ARTN A25

DOI: 10.1051/0004-6361/201630347

Abstract

Context. The extragalactic very-high-energy gamma-ray sky is rich in blazars. These are jetted active galactic nuclei that are viewed at a small angle to the line-of-sight. Only a handful of objects viewed at a larger angle are so far known to emit above 100 GeV. Multi-wavelength studies of such objects up to the highest energies provide new insights into the particle and radiation processes of active galactic nuclei.Aims. We aim to report the results from the first multi-wavelength campaign observing the TeV detected nucleus of the active galaxy IC 310, whose jet is observed at a moderate viewing angle of 10 degrees-20 degrees.Methods. The multi-instrument campaign was conducted between 2012 November and 2013 January, and involved observations with MAGIC, Fermi, INTEGRAL, Swift, OVRO, MOJAVE and EVN. These observations were complemented with archival data from the AllWISE and 2MASS catalogs. A one-zone synchrotron self-Compton model was applied to describe the broadband spectral energy distribution.Results. IC 310 showed an extraordinary TeV flare at the beginning of the campaign, followed by a low, but still detectable TeV flux. Compared to previous measurements in this energy range, the spectral shape was found to be steeper during the low emission state. Simultaneous observations in the soft X-ray band showed an enhanced energy flux state and a harder-when-brighter spectral shape behavior. No strong correlated flux variability was found in other frequency regimes. The broadband spectral energy distribution obtained from these observations supports the hypothesis of a double-hump structure.Conclusions. The harder-when-brighter trend in the X-ray and VHE emission, observed for the first time during this campaign, is consistent with the behavior expected from a synchrotron self-Compton scenario. The contemporaneous broadband spectral energy distribution is well described with a one-zone synchrotron self-Compton model using parameters that are comparable to those found for other gamma-ray-emitting misaligned blazars.

Authors with CRIS profile

Involved external institutions

Autonomous University of Barcelona (UAB) / Universitat Autònoma de Barcelona ES Spain (ES) Instituto de Astrofísica de Canarias (IAC) ES Spain (ES) Institute for Nuclear Researches and Nuclear Energy (INRNE) / Институт за ядрени изследвания и ядрена енергетика (ИЯИЯЕ) BG Bulgaria (BG) Deutsches Elektronen-Synchrotron DESY DE Germany (DE) École Polytechnique Fédérale de Lausanne (EPFL) CH Switzerland (CH) Max-Planck-Institut für Physik (Werner-Heisenberg-Institut, MPP) / Max Planck Institute for Physics DE Germany (DE) Josip-Juraj-Strossmayer-Universität Osijek HR Croatia (HR) National Institute for Astrophysics / Istituto Nazionale Astrofisica (INAF) IT Italy (IT) University of Maryland US United States (USA) (US) Aalto University Espoo FI Finland (FI) European Space Research and Technology Centre (ESTEC, ESA) NL Netherlands (NL) Radboud University Nijmegen NL Netherlands (NL) National Aeronautics and Space Administration (NASA) US United States (USA) (US) Max-Planck-Institut für Radioastronomie / Max Planck Institute for Radio Astronomy DE Germany (DE) Julius-Maximilians-Universität Würzburg DE Germany (DE) University of Amsterdam NL Netherlands (NL) Spanish National Research Council / Consejo Superior de Investigaciones Científicas (CSIC) ES Spain (ES) Universitat de Barcelona (UB) / University of Barcelona ES Spain (ES) Technische Universität Dortmund DE Germany (DE) University of Tokyo JP Japan (JP) University of Udine / Università degli Studi di Udine IT Italy (IT) University of Turku / Turun yliopisto FI Finland (FI) Universidad Complutense de Madrid (UCM) ES Spain (ES) University of Pisa / Università di Pisa (UniPi) IT Italy (IT) Institució Catalana de Recerca i Estudis Avançats (ICREA) / Catalan Institution for Research and Advanced Studies ES Spain (ES) University of Padua / Universita degli Studi di Padova IT Italy (IT) University of Lodz / Uniwersytet Łódzki PL Poland (PL) Università degli Studi di Siena (UNISI) / University of Siena IT Italy (IT) Saha Institute of Nuclear Physics IN India (IN)

How to cite

APA:

Ahnen, M.L., Ansoldi, S., Antonelli, L.A., Arcaro, C., Babic, A., Banerjee, B.,... Magill, J. (2017). First multi-wavelength campaign on the gamma-ray-loud active galaxy IC 310. Astronomy & Astrophysics, 603. https://dx.doi.org/10.1051/0004-6361/201630347

MLA:

Ahnen, M. L., et al. "First multi-wavelength campaign on the gamma-ray-loud active galaxy IC 310." Astronomy & Astrophysics 603 (2017).

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