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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
MAGIC long-term study of the distant TeV blazar PKS 1424+240 in a multiwavelength context
Astronomy and Astrophysics, Volume 567, Article A135, Year 2014
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Description
Aims. We present a study of the very high-energy (VHE; E > 100 GeV) γ-ray emission of the blazar PKS 1424+240 observed with the MAGIC telescopes. The primary aim of this paper is the multiwavelength spectral characterization and modeling of this blazar, which is made particularly interesting by the recent discovery of a lower limit of its redshift of z ≥ 0.6 and makes it a promising candidate to be the most distant VHE source. Methods. The source has been observed with the MAGIC telescopes in VHE γ rays for a total observation time of ∼33.6 h from 2009 to 2011. A detailed analysis of its γ-ray spectrum and time evolution has been carried out. Moreover, we have collected and analyzed simultaneous and quasi-simultaneous multiwavelength data. Results. The source was marginally detected in VHE γ rays during 2009 and 2010, and later, the detection was confirmed during an optical outburst in 2011. The combined significance of the stacked sample is ∼7.2σ. The differential spectra measured during the different campaigns can be described by steep power laws with the indices ranging from 3.5 ± 1.2 to 5.0 ± 1.7. The MAGIC spectra corrected for the absorption due to the extragalactic background light connect smoothly, within systematic errors, with the mean spectrum in 2009-2011 observed at lower energies by the Fermi-LAT. The absorption-corrected MAGIC spectrum is flat with no apparent turn down up to 400 GeV. The multiwavelength light curve shows increasing flux in radio and optical bands that could point to a common origin from the same region of the jet. The large separation between the two peaks of the constructed non-simultaneous spectral energy distribution also requires an extremely high Doppler factor if an one zone synchrotron self-Compton model is applied. We find that a two-component synchrotron self-Compton model describes the spectral energy distribution of the source well, if the source is located at z ∼ 0.6. © ESO 2014.
Authors & Co-Authors
Aleksíc, Jelena
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Ansoldi, Stefano
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Antonelli, Lucio Angelo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Antoranz, Pedro
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Babić, Ana
Croatia, Rijeka
University of Rijeka
Bangale, Priyadarshini
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Barres De Almeida, Ulisses
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Barrio, Juan Abel
Spain, Madrid
Universidad Complutense de Madrid
Becerra González, Josefa
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
United States, College Park
University of Maryland, College Park
Bednarek, Włodzimierz
Poland, Lodz
University of Lodz
Berger, Karsten
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Bernardini, Elisa
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Biland, Adrian
Switzerland, Zurich
Eth Zürich
Blanch, Oscar
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Bock, Rudolf K.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Bonnefoy, Simon
Spain, Madrid
Universidad Complutense de Madrid
Bonnoli, Giacomo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Borracci, F.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Bretz, Thomas
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Switzerland, Lausanne
École Polytechnique Fédérale de Lausanne
Carosi, Alessandro
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Colin, Pierre
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Colombo, E.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Contreras, José Luis
Spain, Madrid
Universidad Complutense de Madrid
Cortina, J.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Covino, Stefano
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
da Vela, Paolo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Dazzi, Francesco
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
De Angelis, Alessandro D.
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
De Lotto, Barbara
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Doert, Marlene
Germany, Dortmund
Technische Universität Dortmund
Domínguez, A. D.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
United States, Riverside
University of California, Riverside
Dominis-Prester, Dijana
Croatia, Rijeka
University of Rijeka
Dorner, Daniela
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Doro, Michele
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Einecke, Sabrina
Germany, Dortmund
Technische Universität Dortmund
Eisenacher, Dorit
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Elsässer, Dominik
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Ferenc, Daniela
Croatia, Rijeka
University of Rijeka
Fonseca, M. V.
Spain, Madrid
Universidad Complutense de Madrid
Font, Ll L.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Fruck, Christian
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
García López, Ramón J.
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Garczarczyk, Markus
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Gaug, Markus
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Giavitto, Gianluca
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Godinović, Nikola
Croatia, Rijeka
University of Rijeka
González Muñoz, A.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Gozzini, Sara Rebecca
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Hadasch, Daniela
Spain, Barcelona
Csic - Instituto de Ciencias Del Espacio Ice
Hayashida, Masaaki
Japan, Kyoto
Kyoto University
Herrero Davó, Artemio Alonso
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Hildebrand, Dorothée
Switzerland, Zurich
Eth Zürich
Hose, Juergen
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Hrupec, Dario
Croatia, Rijeka
University of Rijeka
Kadenius, Ville
Finland, Turku
Turun Yliopisto
Kellermann, Hanna
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Konno, Yusuke
Japan, Kyoto
Kyoto University
Kubo, Hidetoshi
Japan, Kyoto
Kyoto University
Kushida, Junko
Japan, Kyoto
Kyoto University
La Barbera, Antonino
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Lelas, Damir
Croatia, Rijeka
University of Rijeka
Lewandowska, Natalia
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Lindfors, Elina J.
Finland, Turku
Turun Yliopisto
Lombardi, Saverio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
López-Moya, Marcos
Spain, Madrid
Universidad Complutense de Madrid
López-Coto, Rubén
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
López-Oramas, Alicia
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Lorenz, Eckhart
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Makariev, M. V.
Bulgaria, Sofia
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Maneva, Galina M.
Bulgaria, Sofia
Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences
Mankuzhiyil, Nijil
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Mannheim, Karl
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Maraschi, Laura
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Marcote, Benito
Unknown Affiliation
Mariotti, M.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Martínez, Manel
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Mazin, Daniel
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Menzel, Uta
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Meucci, Mario
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Mirzoyan, Razmik G.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Moralejo, Abelardo
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Munar-Adrover, Pere
Unknown Affiliation
Maciołek-Niedźwiecki, Andrzej
Poland, Lodz
University of Lodz
Nilsson, Kari
Finland, Turku
Turun Yliopisto
Nishijima, Kyoshi
Japan, Kyoto
Kyoto University
Paiano, Simona
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Palatiello, Michele
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Paneque, David
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Paoletti, Riccardo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Paredes, Josep Maria
Unknown Affiliation
Persic, Massimo
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Trieste
Osservatorio Astronomico Di Trieste
Prada, Francisco
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Spain, Madrid
Universidad Autónoma de Madrid
Prada Moroni, Pier Giorgio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Prandini, Elisa
Switzerland, Zurich
Eth Zürich
Puljak, Ivica
Croatia, Rijeka
University of Rijeka
Reinthal, Riho
Finland, Turku
Turun Yliopisto
Rhode, Wolfgang
Germany, Dortmund
Technische Universität Dortmund
Ribó, Marc
Unknown Affiliation
Rico, Javier R.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Saggion, Antonio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Scalzotto, Villi
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Schweizer, Thomas
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Shore, Steven N.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Sillanp̈äa, Aimo K.
Finland, Turku
Turun Yliopisto
Sitarek, Julian
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Sobczyńska, Dorota
Poland, Lodz
University of Lodz
Spanier, Felix
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Stamerra, Antonio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Steinbring, T.
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Takalo, Leo O.
Finland, Turku
Turun Yliopisto
Tavecchio, Fabrizio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Terzić, Tomislav
Croatia, Rijeka
University of Rijeka
Teshima, Masahiro
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Tibolla, Omar
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Torres, Diego F.
Spain, Barcelona
Csic - Instituto de Ciencias Del Espacio Ice
Treves, Aldo
Italy, Varese
Università Degli Studi Dell'insubria
Zanin, Roberta
Unknown Affiliation
Cutini, S.
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Gasparrini, Dario
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Furniss, Amy K.
United States, Palo Alto
Stanford University
Hovatta, Talvikki
United States, Pasadena
California Institute of Technology
Kangas, Tuomas
Unknown Affiliation
Kankare, Erkki
Unknown Affiliation
Kotilainen, Jari K.
Unknown Affiliation
Lister, Matthew L.
United States, West Lafayette
Purdue University
L¨ahteenm¨aki, Anne A.
Finland, Espoo
Aalto University
Max-Moerbeck, Walter
United States, Pasadena
California Institute of Technology
Pavlidou, Vasiliki
Greece, Rethymnon
University of Crete
Readhead, Anthony C.S.
United States, Pasadena
California Institute of Technology
Richards, Joseph L.
United States, West Lafayette
Purdue University
Statistics
Citations: 51
Authors: 130
Affiliations: 34
Identifiers
Doi:
10.1051/0004-6361/201423364
ISSN:
00046361
Research Areas
Environmental