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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Probing quantum gravity using photons from a flare of the active galactic nucleus Markarian 501 observed by the MAGIC telescope
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Volume 668, No. 4, Year 2008
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Description
We analyze the timing of photons observed by the MAGIC telescope during a flare of the active galactic nucleus Mkn 501 for a possible correlation with energy, as suggested by some models of quantum gravity (QG), which predict a vacuum refractive index ≃ 1 + (E / MQGn)n, n = 1, 2. Parametrizing the delay between γ-rays of different energies as Δ t = ± τl E or Δ t = ± τq E2, we find τl = (0.030 ± 0.012) s / GeV at the 2.5-σ level, and τq = (3.71 ± 2.57) × 10-6 s / GeV2, respectively. We use these results to establish lower limits MQG 1 > 0.21 × 1018 GeV and MQG 2 > 0.26 × 1011 GeV at the 95% C.L. Monte Carlo studies confirm the MAGIC sensitivity to propagation effects at these levels. Thermal plasma effects in the source are negligible, but we cannot exclude the importance of some other source effect. © 2008 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Aliu, Ester
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Antonelli, Lucio Angelo
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Antoranz, Pedro
Spain, Madrid
Universidad Complutense de Madrid
Backes, Michael
Germany, Dortmund
Technische Universität Dortmund
Baixeras, Cármen
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Barrio, Juan Abel
Spain, Madrid
Universidad Complutense de Madrid
Bartko, Hendrik
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Bastieri, D.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Becker, Julia K.
Germany, Dortmund
Technische Universität Dortmund
Bednarek, Włodzimierz
Poland, Lodz
University of Lodz
Bernardini, Elisa
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Bigongiari, C.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Biland, Adrian
Switzerland, Zurich
Eth Zürich
Bock, Rudolf K.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Bonnoli, Giacomo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Bordas, Pol
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Bosch-Ramón, Valentí
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Bretz, Thomas
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Chilingarian, A. A.
Armenia, Yerevan
Yerevan Physics Institute
Commichau, Sebastian C.
Switzerland, Zurich
Eth Zürich
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
Dazzi, Francesco
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
De Angelis, Alessandro D.
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
De Los Reyes, Raquel R.
Spain, Madrid
Universidad Complutense de Madrid
De Lotto, Barbara
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Domínguez, A. D.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Dorner, Daniela
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Doro, Michele
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Errando, Manel
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Ferenc, Daniela
United States, Davis
University of California, Davis
Fernández, Enrique W.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Firpo, Roger
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Fonseca, M. V.
Spain, Madrid
Universidad Complutense de Madrid
Font, Ll L.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Galante, Nicola
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, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Gaug, Markus
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Goebel, Florian
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Hayashida, Masaaki
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Herrero Davó, Artemio Alonso
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Hose, Juergen
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Hsu, C. C.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Jogler, Tobias
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Kranich, Daniel
Switzerland, Zurich
Eth Zürich
La Barbera, Antonino
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Laille, Alvin
United States, Davis
University of California, Davis
Lindfors, Elina J.
Finland, Kaarina
Tuorlan Observatorio
Lombardi, Saverio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Longo, Francesco
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
López-Moya, Marcos
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Majumdar, Pratik
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
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
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
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Meucci, Mario
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Meyer, Markus
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Mirzoyan, Razmik G.
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Moles, Mariano
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Moralejo, Abelardo
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Nieto, Daniel
Spain, Madrid
Universidad Complutense de Madrid
Nilsson, Kari
Finland, Kaarina
Tuorlan Observatorio
Otte, Adam Nepomuk
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Germany, Berlin
Humboldt-universität zu Berlin
Oya, Igor
Spain, Madrid
Universidad Complutense de Madrid
Paoletti, Riccardo
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Paredes, Josep Maria
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Pasanen, Mikko
Finland, Kaarina
Tuorlan Observatorio
Pascoli, Donatella
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Pauss, Felicitas
Switzerland, Zurich
Eth Zürich
Pegna, Raffaello G.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Pérez-Torres, M. A.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Persic, Massimo
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Italy, Trieste
Osservatorio Astronomico Di Trieste
Peruzzo, Luigi
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Piccioli, A.
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Prada, Francisco
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Prandini, Elisa
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Rhode, Wolfgang
Germany, Dortmund
Technische Universität Dortmund
Ribó, Marc
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Rico, Javier R.
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Spain, Barcelona
Institució Catalana de Recerca I Estudis Avançats
Robert, Arnau
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Saggion, Antonio
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
Sánchez-Conde, Miguel A. A.
Spain, Madrid
Consejo Superior de Investigaciones Científicas
Sartori, P.
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
Shayduk, Maxim
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Shinozaki, Kenji
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Sillanp̈äa, Aimo K.
Finland, Kaarina
Tuorlan Observatorio
Sobczyńska, Dorota
Poland, Lodz
University of Lodz
Spanier, Felix
Germany, Wurzburg
Julius-maximilians-universität Würzburg
Stamerra, Antonio
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Stark, Luisa Sabrina
Switzerland, Zurich
Eth Zürich
Takalo, Leo O.
Finland, Kaarina
Tuorlan Observatorio
Tavecchio, Fabrizio
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Teshima, Masahiro
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Tluczykont, Martin
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Torres, Diego F.
Spain, Barcelona
Csic - Instituto de Ciencias Del Espacio Ice
Spain, Barcelona
Institució Catalana de Recerca I Estudis Avançats
Turini, Nicola
Italy, Pisa
Istituto Nazionale Di Fisica Nucleare, Sezione Di Pisa
Vitale, V.
Italy, Trieste
Istituto Nazionale Di Fisica Nucleare, Sezione Di Trieste
Wittek, Wolfgang
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Zabalza, Víctor
Spain, Barcelona
Instituto de Estudios Espaciales de Cataluña
Zanin, Roberta
Spain, Cerdanyola Del Valles
Institut de Física D'altes Energies, Bellaterra
Ellis, John R.
Switzerland, Geneva
Organisation Européenne Pour la Recherche Nucléaire
Mavromatos, E. Nick
United Kingdom, London
King's College London
Statistics
Citations: 223
Authors: 110
Affiliations: 29
Identifiers
Doi:
10.1016/j.physletb.2008.08.053
ISSN:
03702693