Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Very high energy gamma-ray observations of strong flaring activity in M87 in 2008 february
Astrophysical Journal, Volume 685, No. 1 PART 2, Year 2008
Notification
URL copied to clipboard!
Description
M87 is the only known nonblazar radio galaxy to emit very high energy (VHE) gamma rays. During a monitoring program of M87, a rapid flare in VHE gamma-rays was detected by the MAGIC telescope in early 2008. The flux was found to be variable above 350 GeV on a timescale as short as 1 day at a significance level of 5.6 a. The highest measured flux reached 15% of the Crab Nebula flux. We observed several substantial changes of the flux level during the 13 day observing period. The flux at lower energies (150-350 GeV), instead, is compatible with being constant. The energy spectrum can be described by a power law with a photon index of 2.30 ± 0.1 lstat ± 0.20 syst. The observed day-scale flux variability at VHE prefers the M87 core as source of the emission and implies that either the emission region is very compact (just a few Schwarzschild radii) or the Doppler factor of the emitting blob is rather large in the case of a nonexpanding emission region. © 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A.
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
Lorenz, Eckhart
Switzerland, Zurich
Eth Zürich
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Majumdar, Pratik
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Maneva, Galina M.
Unknown Affiliation
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
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
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
Mizobuchi, S.
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
United States, Santa Cruz
University of California, Santa Cruz
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
Shore, Steven N.
Italy, Rome
Istituto Nazionale Di Fisica Nucleare - Infn
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, Madrid
Consejo Superior de Investigaciones Científicas
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
Statistics
Citations: 106
Authors: 111
Affiliations: 23
Identifiers
Doi:
10.1086/592348
ISSN:
0004637X
Research Areas
Environmental