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The first gamma-ray outburst of a narrow-line Seyfert 1 galaxy: the case of PMN J0948+0022 in 2010 July

Foschini, L. ; Ghisellini, G. ; Kovalev, Y. Y. ; Lister, M. L. ; D'Ammando, F. ; Thompson, D. J. ; Tramacere, A. ; Angelakis, E. ; Donato, D. ; Falcone, A. ; Fuhrmann, L. ; Hauser, M. ; Kovalev, Yu. A. ; Mannheim, K. ; Maraschi, L. ; Max-Moerbeck, W. ; Nestoras, I. ; Pavlidou, V. ; Pearson, T. J. ; Pushkarev, A. B. ; Readhead, A. C. S. ; Richards, J. L. ; Stevenson, M. A. ; Tagliaferri, G. ; Tibolla, O. ; Tavecchio, F. ; Wagner, S.

In: Monthly Notices of the Royal Astronomical Society, 2011, vol. 413, no. 3, p. 1671-1677

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    Titre
    • The first gamma-ray outburst of a narrow-line Seyfert 1 galaxy: the case of PMN J0948+0022 in 2010 July
    Auteur
    • Foschini, L.. INAF - Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate (LC), Italy
    • Ghisellini, G.. INAF - Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate (LC), Italy
    • Kovalev, Y. Y.. Astro Space Center of the Lebedev Physical Institute, Profsoyuznaya 84/32, 117997 Moscow, Russia
    • Lister, M. L.. Department of Physics, Purdue University, 525 Northwestern Avenue, West Lafayette, IN 47907, USA
    • D'Ammando, F.. INAF - IASF-Palermo, Via Ugo La Malfa 153, 90146 Palermo, Italy
    • Thompson, D. J.. NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
    • Tramacere, A.. ISDC Data Centre for Astrophysics, Chemin d'Ecogia 16, CH-1290 Versoix, Switzerland
    • Angelakis, E.. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
    • Donato, D.. Center for Research and Exploration in Space Science and Technology and NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
    • Falcone, A.. Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, USA
    • Fuhrmann, L.. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
    • Hauser, M.. Landessternwarte, Universität Heidelberg, Königstuhl, D-69117 Heidelberg, Germany
    • Kovalev, Yu. A.. Astro Space Center of the Lebedev Physical Institute, Profsoyuznaya 84/32, 117997 Moscow, Russia
    • Mannheim, K.. Institut für Theoretische Physik und Astrophysik, University of Würzburg, 97074 Würzburg, Germany
    • Maraschi, L.. INAF - Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate (LC), Italy
    • Max-Moerbeck, W.. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
    • Nestoras, I.. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
    • Pavlidou, V.. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
    • Pearson, T. J.. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
    • Pushkarev, A. B.. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
    • Readhead, A. C. S.. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
    • Richards, J. L.. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
    • Stevenson, M. A.. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
    • Tagliaferri, G.. INAF - Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate (LC), Italy
    • Tibolla, O.. Institut für Theoretische Physik und Astrophysik, University of Würzburg, 97074 Würzburg, Germany
    • Tavecchio, F.. INAF - Osservatorio Astronomico di Brera, via E. Bianchi 46, 23807 Merate (LC), Italy
    • Wagner, S.. Landessternwarte, Universität Heidelberg, Königstuhl, D-69117 Heidelberg, Germany
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Monthly Notices of the Royal Astronomical Society, 2011, vol. 413, no. 3, p. 1671-1677. Blackwell Publishing Ltd
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:300137
    Summary
    We report on a multiwavelength campaign for the radio-loud narrow-line Seyfert 1 (NLS1) galaxy PMN J0948+0022 (z= 0.5846) performed in 2010 July-September and triggered by a high-energy γ-ray outburst observed by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope. The peak flux in the 0.1-100 GeV energy band exceeded, for the first time in this type of source, the value of ∼10−6 photon cm−2 s−1, corresponding to an observed luminosity of ∼1048 erg s−1. Although the source was too close to the Sun position to organize a densely sampled follow-up, it was possible to gather some multiwavelength data that confirmed the state of high activity across the sampled electromagnetic spectrum. The comparison of the spectral energy distribution of the NLS1 PMN J0948+0022 with that of a typical blazar - such as 3C 273 - shows that the power emitted at γ-rays is extreme