Insights into the emission of the blazar 1ES 1011+496 through unprecedented broadband observations during 2011 and 2012

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • J. Aleksić
  • S. Ansoldi
  • L. A. Antonelli
  • P. Antoranz
  • C. Arcaro
  • A. Babic
  • P. Bangale
  • U. Barres De Almeida
  • J. A. Barrio
  • J. Becerra González
  • W. Bednarek
  • E. Bernardini
  • B. Biasuzzi
  • A. Biland
  • O. Blanch
  • S. Bonnefoy
  • G. Bonnoli
  • F. Borracci
  • T. Bretz
  • E. Carmona
  • A. Carosi
  • P. Colin
  • E. Colombo
  • J. L. Contreras
  • J. Cortina
  • S. Covino
  • P. Da Vela
  • F. Dazzi
  • A. De Angelis
  • G. De Caneva
  • B. De Lotto
  • E. De Oña Wilhelmi
  • C. Delgado Mendez
  • F. Di Pierro
  • D. Dominis Prester
  • D. Dorner
  • M. Doro
  • S. Einecke
  • D. Eisenacher
  • D. Elsaesser
  • A. Fernández-Barral
  • D. Fidalgo
  • M. V. Fonseca
  • L. Font
  • K. Frantzen
  • C. Fruck
  • D. Galindo
  • R. J. García López
  • M. Garczarczyk
  • D. Garrido Terrats
  • M. Gaug
  • N. Godinović
  • A. González Muñoz
  • S. R. Gozzini
  • D. Hadasch
  • Y. Hanabata
  • M. Hayashida
  • J. Herrera
  • J. Hose
  • D. Hrupec
  • W. Idec
  • V. Kadenius
  • H. Kellermann
  • M. L. Knoetig
  • K. Kodani
  • Y. Konno
  • J. Krause
  • H. Kubo
  • J. Kushida
  • A. La Barbera
  • D. Lelas
  • N. Lewandowska
  • E. Lindfors
  • S. Lombardi
  • F. Longo
  • M. López
  • R. López-Coto
  • A. López-Oramas
  • E. Lorenz
  • I. Lozano
  • M. Makariev
  • K. Mallot
  • G. Maneva
  • K. Mannheim
  • L. Maraschi
  • B. Marcote
  • M. Mariotti
  • M. Martínez
  • D. Mazin
  • U. Menzel
  • J. M. Miranda
  • R. Mirzoyan
  • A. Moralejo
  • P. Munar-Adrover
  • D. Nakajima
  • V. Neustroev
  • A. Niedzwiecki
  • M. Nievas Rosillo
  • K. Nilsson
  • K. Nishijima
  • K. Noda
  • R. Orito
  • A. Overkemping
  • S. Paiano
  • M. Palatiello
  • D. Paneque
  • R. Paoletti
  • J. M. Paredes
  • X. Paredes-Fortuny
  • M. Persic
  • J. Poutanen
  • P. G. Prada Moroni
  • E. Prandini
  • I. Puljak
  • R. Reinthal
  • W. Rhode
  • M. Ribó
  • J. Rico
  • J. Rodriguez Garcia
  • T. Saito
  • K. Saito
  • K. Satalecka
  • V. Scalzotto
  • V. Scapin
  • T. Schweizer
  • S. N. Shore
  • A. Sillanpää
  • J. Sitarek
  • I. Snidaric
  • D. Sobczynska
  • A. Stamerra
  • T. Steinbring
  • M. Strzys
  • L. Takalo
  • H. Takami
  • F. Tavecchio
  • P. Temnikov
  • T. Terzić
  • D. Tescaro
  • M. Teshima
  • J. Thaele
  • D. F. Torres
  • T. Toyama
  • A. Treves
  • P. Vogler
  • M. Will
  • R. Zanin
  • S. Buson
  • F. D'Ammando
  • Y. Y. Kovalev
  • M. L. Lister
  • W. Max-Moerbeck
  • C. Mundell
  • A. B. Pushkarev
  • E. Rastorgueva-Foi
  • A. C S Readhead
  • J. L. Richards
  • D. A. Sanchez
  • I. Steele

Research units

  • Autonomous University of Barcelona
  • University of Udine
  • INAF, Osservatorio Astronomico di Roma
  • University of Siena
  • Università Degli Studi di Padova
  • University of Rijeka
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Brazilian Center for Research in Physics
  • University of Maryland, College Park
  • University of Lódz
  • Swiss Federal Institute of Technology Zurich
  • CIEMAT
  • Institute of Space Sciences (IEEC-CSIC)
  • University of Würzburg
  • University of Barcelona
  • Finnish MAGIC Consortium
  • University of Turku
  • Finnish Centre for Astronomy with ESO (FINCA)
  • University of Pisa
  • ICREA
  • University of Insubria
  • Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
  • California Institute of Technology
  • Purdue University
  • National Radio Astronomy Observatory Socorro
  • University of Liverpool
  • Crimean Astrophysical Observatory
  • University of Split
  • Max-Planck-Institut für Physik
  • Complutense University
  • Instituto de Astrofísica de Canarias
  • Deutsches Elektronen-Synchrotron
  • Swiss Federal Institute of Technology Lausanne
  • Technische Universität Dortmund
  • Leopold-Franzens-Universität Innsbruck
  • Tokai University
  • Tokushima University
  • University of Tokyo
  • University of Oulu
  • Inst. for Nucl. Research and Nucl. Energy
  • Japanese MAGIC Consortium
  • Kyoto University
  • ISDC, Science Data Center for Astrophysics
  • Croatian MAGIC Consortium
  • National Institute for Nuclear Physics
  • RAS - Pulkovo Astronomical Observatory
  • Max-Planck-Institut für Radioastronomie
  • Universite de Savoie
  • Russian Academy of Science Lebedev Physical Institute, Ctr Astro Space
  • Max Planck Institute for Radio Astronomy

Abstract

Context. 1ES 1011+496 (z = 0:212) was discovered in very high-energy (VHE, E > 100 GeV) γ rays with MAGIC in 2007. The absence of simultaneous data at lower energies led to an incomplete characterization of the broadband spectral energy distribution (SED). Aims. We study the source properties and the emission mechanisms, probing whether a simple one-zone synchrotron self-Compton (SSC) scenario is able to explain the observed broadband spectrum. Methods. We analyzed data in the range from VHE to radio data from 2011 and 2012 collected by MAGIC, Fermi-LAT, Swift, KVA, OVRO, and Metsähovi in addition to optical polarimetry data and radio maps from the Liverpool Telescope and MOJAVE. Results. The VHE spectrum was fit with a simple power law with a photon index of 3:69 ± 0:22 and a flux above 150 GeV of (1:46 ± 0:16) × 10-11 ph cm-2 s-1. The source 1ES 1011+496 was found to be in a generally quiescent state at all observed wavelengths, showing only moderate variability from radio to X-rays. A low degree of polarization of less than 10% was measured in optical, while some bright features polarized up to 60% were observed in the radio jet. A similar trend in the rotation of the electric vector position angle was found in optical and radio. The radio maps indicated a superluminal motion of 1.8±0.4 c, which is the highest speed statistically significant measured so far in a high-frequency-peaked BL Lac. Conclusions. For the first time, the high-energy bump in the broadband SED of 1ES 1011+496 could be fully characterized from 0.1 GeV to 1 TeV, which permitted a more reliable interpretation within the one-zone SSC scenario. The polarimetry data suggest that at least part of the optical emission has its origin in some of the bright radio features, while the low polarization in optical might be due to the contribution of parts of the radio jet with different orientations of the magnetic field with respect to the optical emission.

Details

Original languageEnglish
Article numberA10
Number of pages14
JournalAstronomy and Astrophysics
Volume591
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • BL Lacertae objects: individual: 1ES 1011+496, galaxies: active, galaxies: jets, gamma rays: galaxies, radiation mechanisms: non-thermal

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