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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Search for extended γ-ray emission around AGN with H.E.S.S. and Fermi -LAT
Astronomy and Astrophysics, Volume 562, Article A145, Year 2014
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Description
Context. Very-high-energy (VHE; E > 100 GeV) γ-ray emission from blazars inevitably gives rise to electron-positron pair production through the interaction of these γ-rays with the extragalactic background light (EBL). Depending on the magnetic fields in the proximity of the source, the cascade initiated from pair production can result in either an isotropic halo around an initially beamed source or a magnetically broadened cascade flux. Aims. Both extended pair-halo (PH) and magnetically broadened cascade (MBC) emission from regions surrounding the blazars 1ES 1101-232, 1ES 0229+200, and PKS 2155-304 were searched for using VHE γ-ray data taken with the High Energy Stereoscopic System (H.E.S.S.) and high-energy (HE; 100 MeV < E < 100 GeV) γ-ray data with the Fermi Large Area Telescope (LAT). Methods. By comparing the angular distributions of the reconstructed γ-ray events to the angular profiles calculated from detailed theoretical models, the presence of PH and MBC was investigated. Results. Upper limits on the extended emission around 1ES 1101-232, 1ES 0229+200, and PKS 2155-304 are found to be at a level of a few per cent of the Crab nebula flux above 1 TeV, depending on the assumed photon index of the cascade emission. Assuming strong extra-Galactic magnetic field (EGMF) values, >10-12 G, this limits the production of pair haloes developing from electromagnetic cascades. For weaker magnetic fields, in which electromagnetic cascades would result in MBCs, EGMF strengths in the range (0.3-3) × 10-15 G were excluded for PKS 2155-304 at the 99% confidence level, under the assumption of a 1 Mpc coherence length. © ESO, 2014.
Authors & Co-Authors
Abramowski, Attila
Germany, Hamburg
Universität Hamburg
Aharonian, F. A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Ireland, Dublin
Institiúid Ard-lénn Bhaile Átha Cliath
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Ait Benkhali, F.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Akhperjanian, Ashot G.
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Armenia, Yerevan
Yerevan Physics Institute
Angüner, Ekrem Oǧuzhan
Germany, Berlin
Humboldt-universität zu Berlin
Anton, Gisela K.Stycz
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Backes, Michael
Namibia, Windhoek
University of Namibia
Balenderan, S.
United Kingdom, Durham
Durham University
Balzer, Arnim
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Germany, Potsdam
Universität Potsdam
Barnacka, Anna
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Becherini, Yvonne
Sweden, Vaxjo
Linnaeus University, Växjö
Becker-Tjus, Julia
Germany, Bochum
Ruhr-universitat Bochum
Bernlöhr, Konrad
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Germany, Berlin
Humboldt-universität zu Berlin
Birsin, Emrah
Germany, Berlin
Humboldt-universität zu Berlin
Bissaldi, Elisabetta
Austria, Innsbruck
Universität Innsbruck
Biteau, Jonathan
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
United States, Santa Cruz
Santa Cruz Institute for Particle Physics
Boettcher, M.
South Africa, Potchefstroom
North-west University
Boisson, Catherine
France, Paris
L'observatoire de Paris
Bolmont, Julien
France, Paris
Sorbonne Université
Bordas, Pol
Germany, Tubingen
Eberhard Karls Universität Tübingen
Brucker, Julia
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Brun, François
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Brun, Pierre
France, Gif-sur-yvette
Cea Saclay
Bulk, Tomasz
Poland, Warsaw
University of Warsaw
Carrigan, Svenja
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Casanova, Sabrina
Germany, Heidelberg
Max-planck-institut Für Kernphysik
South Africa, Potchefstroom
North-west University
Chadwick, Paula M.
United Kingdom, Durham
Durham University
Chalmé-Calvet, Raphaël
France, Paris
Sorbonne Université
Chaves, Ryan C.G.
France, Gif-sur-yvette
Cea Saclay
Cheesebrough, A.
United Kingdom, Durham
Durham University
Chrétien, Mathieu
France, Paris
Sorbonne Université
Colafrancesco, Sergio
South Africa, Johannesburg
University of the Witwatersrand
Cologna, Gabriele
Germany, Heidelberg
Universität Heidelberg
Conrad, Jan
Sweden, Stockholm
Oskar Klein Centre
Sweden, Stockholm
Wallenberg Academy
Couturier, C.
France, Paris
Sorbonne Université
Cui, Yudong
Germany, Tubingen
Eberhard Karls Universität Tübingen
Dalton, Matthew L.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
France
European Community
Daniel, Michael K.
United Kingdom, Durham
Durham University
Davids, Isak Delberth
Namibia, Windhoek
University of Namibia
South Africa, Potchefstroom
North-west University
Degrange, Bernard
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Deil, Christoph
Germany, Heidelberg
Max-planck-institut Für Kernphysik
DeWilt, P.
Australia, Adelaide
The University of Adelaide
Dickinson, Hugh J.
Sweden, Stockholm
Oskar Klein Centre
Djannati-Ataï, Arache
France, Paris
Université Paris Cité
Domainko, Wilfried F.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Drury, Luke O'C
Ireland, Dublin
Institiúid Ard-lénn Bhaile Átha Cliath
Dubus, Guillaume
France, Paris
Insu - Institut National Des Sciences de L'univers
Dutson, Kate L.
United Kingdom, Leicester
University of Leicester
Dyks, Jarosław
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Dyrda, Michael
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Edwards, Thomas D.P.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Egberts, Kathrin
Austria, Innsbruck
Universität Innsbruck
Eger, Peter A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Espigat, P.
France, Paris
Université Paris Cité
Farnier, Christian
Sweden, Stockholm
Oskar Klein Centre
Fegan, Stephen J.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Feinstein, Fabrice
France, Montpellier
Université de Montpellier
Fernandes, Milton Virgílio
Germany, Hamburg
Universität Hamburg
Fernandez, Diane
France, Montpellier
Université de Montpellier
Fiasson, Armand
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Fontaine, Gérard
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Förster, Andreas
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Füssling, Matthias
Germany, Potsdam
Universität Potsdam
Gajdus, Michael
Germany, Berlin
Humboldt-universität zu Berlin
Gallant, Yves A.
France, Montpellier
Université de Montpellier
Garrigoux, Tania
France, Paris
Sorbonne Université
Giavitto, Gianluca
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Giebels, Berrie
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Glicenstein, Jean François
France, Gif-sur-yvette
Cea Saclay
Grondin, Marie Hélène
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Germany, Heidelberg
Universität Heidelberg
Grudzínska, Mira
Poland, Warsaw
University of Warsaw
Häffner, Stephanie
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Hahn, Joachim
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Harris, Jonathan
United Kingdom, Durham
Durham University
Heinzelmann, Götz
Germany, Hamburg
Universität Hamburg
Henri, Gilles
France, Paris
Insu - Institut National Des Sciences de L'univers
Hermann, German
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hervet, Olivier
France, Paris
L'observatoire de Paris
Hillert, Andreas
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hinton, James A.J.A.
United Kingdom, Leicester
University of Leicester
Hofmann, Werner
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hofverberg, Petter
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Holler, Markus
Germany, Potsdam
Universität Potsdam
Horns, Dieter
Germany, Hamburg
Universität Hamburg
Jachołkowska, Agnieszka
France, Paris
Sorbonne Université
Jahn, C.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Jamrozy, Marek
Poland, Krakow
Uniwersytet Jagielloński
Janiak, Mateusz
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Jankowsky, Felix
Germany, Heidelberg
Universität Heidelberg
Jung-Richardt, Ira V.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Kastendieck, Max Anton
Germany, Hamburg
Universität Hamburg
Katarzyński, Krzysztof
Poland, Torun
Uniwersytet Mikołaja Kopernika w Toruniu
Katz, Ulrich F.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Kaufmann, Sarah
Germany, Heidelberg
Universität Heidelberg
Khélifi, Bruno
France, Paris
Université Paris Cité
Kieffer, M.
France, Paris
Sorbonne Université
Klepser, Stefan
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Klochkov, Dmitry K.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Kluaźniak, W.
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Kneiske, Tanja M.
Germany, Hamburg
Universität Hamburg
Kolitzus, D.
Austria, Innsbruck
Universität Innsbruck
Komin, Nukri
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Kosack, Karl
France, Gif-sur-yvette
Cea Saclay
Krakau, S.
Germany, Bochum
Ruhr-universitat Bochum
Krayzel, Fabien
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Krüger, P. P.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
South Africa, Potchefstroom
North-west University
Laffon, Hélène
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lamanna, Giovanni
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lemière, Anne
France, Paris
Université Paris Cité
Lemoine-Goumard, Marianne
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Lenain, Jean Philippe
France, Paris
Sorbonne Université
Lohse, Thomas
Germany, Berlin
Humboldt-universität zu Berlin
Lu, Chiachun
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Marandon, Vincent
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Marcowith, Alexandre
France, Montpellier
Université de Montpellier
Marx, Ramin
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Maurin, Guillaume T.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Maxted, Nigel I.
Australia, Adelaide
The University of Adelaide
Mayer, Michael
Germany, Potsdam
Universität Potsdam
McComb, T. J.Lowry
United Kingdom, Durham
Durham University
Méhault, Jérémie
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
France
European Community
Meintjes, Pieter J.
South Africa, Bloemfontein
University of the Free State
Meyer, Manuel S.
Sweden, Stockholm
Oskar Klein Centre
Moderski, Rafaƚ
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Moulin, E.
France, Gif-sur-yvette
Cea Saclay
Murach, Thomas
Germany, Berlin
Humboldt-universität zu Berlin
de Naurois, Mathieu
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Niemiec, Jacek
Poland, Krakow
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Nolan, Sam J.
United Kingdom, Durham
Durham University
Ohm, Stefan
United Kingdom, Leicester
University of Leicester
De Oña Wilhelmi, Emma
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Ostrowski, Michałl
Poland, Krakow
Uniwersytet Jagielloński
Oya, Igor
Germany, Berlin
Humboldt-universität zu Berlin
Panter, M.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Parsons, Robert Daniel
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Pekeur, Nikki W.
South Africa, Potchefstroom
North-west University
Pelletier, Guy
France, Paris
Insu - Institut National Des Sciences de L'univers
Petrucci, Pierre Olivier
France, Paris
Insu - Institut National Des Sciences de L'univers
Pita, Santiago
France, Paris
Université Paris Cité
Poon, Helen
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Pûhlhofer, Gerd
Germany, Tubingen
Eberhard Karls Universität Tübingen
Punch, Michael
France, Paris
Université Paris Cité
Quirrenbach, Andreas
Germany, Heidelberg
Universität Heidelberg
Raue, Martin
Germany, Hamburg
Universität Hamburg
Reimer, Anita
Austria, Innsbruck
Universität Innsbruck
Reimer, Olaf
Austria, Innsbruck
Universität Innsbruck
Renaud, Matthieu
France, Montpellier
Université de Montpellier
De Los Reyes, Raquel R.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Rieger, Frank M.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Rob, L.
Czech Republic, Prague
Charles University
Rosier-Lees, Sylvie
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Rowell, Gavin P.
Australia, Adelaide
The University of Adelaide
Rudak, Bronisław
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Rulten, Cameron B.
France, Paris
L'observatoire de Paris
Sahakian, Vardan H.
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Armenia, Yerevan
Yerevan Physics Institute
Sánchez, David A.
France, Paris
In2p3 - Institut National de Physique Nucléaire et de Physique Des Particules
Santangelo, Andrea E.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Schlickeiser, Reinhard
Germany, Bochum
Ruhr-universitat Bochum
Schüssler, Fabian
France, Gif-sur-yvette
Cea Saclay
Schwanke, Ullrich
Germany, Berlin
Humboldt-universität zu Berlin
Schwarzburg, S.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Sol, Hélène
France, Paris
L'observatoire de Paris
Spengler, Gerrit
Germany, Berlin
Humboldt-universität zu Berlin
Stawarz, Łukasz
Poland, Krakow
Uniwersytet Jagielloński
Steenkamp, R.
Namibia, Windhoek
University of Namibia
Stegmann, Christian
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Germany, Potsdam
Universität Potsdam
Stinzing, Friedrich
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Sushch, Iurii
Germany, Berlin
Humboldt-universität zu Berlin
South Africa, Potchefstroom
North-west University
Tavernet, Jean Paul
France, Paris
Sorbonne Université
Terrier, Régis
France, Paris
Université Paris Cité
Tluczykont, Martin
Germany, Hamburg
Universität Hamburg
Valerius, Kathrin
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Van Eldik, Christopher
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
van Soelen, Brian V.A.N.
South Africa, Bloemfontein
University of the Free State
Vasileiadis, Georges
France, Montpellier
Université de Montpellier
Venter, C.
South Africa, Potchefstroom
North-west University
Viana, Aion A.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Vincent, P.
France, Paris
Sorbonne Université
Völk, Heinrich J.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Volpe, Francesca
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Vorster, Michael J.
South Africa, Potchefstroom
North-west University
Wagner, Stefan J.
Germany, Heidelberg
Universität Heidelberg
Wagner, Philipp
Germany, Berlin
Humboldt-universität zu Berlin
Ward, Martin J.
United Kingdom, Durham
Durham University
Weidinger, Matthias
Germany, Bochum
Ruhr-universitat Bochum
White, Richard J.
United Kingdom, Leicester
University of Leicester
Wierzcholska, Alicja
Poland, Krakow
Uniwersytet Jagielloński
Wouters, Denis
France, Gif-sur-yvette
Cea Saclay
Yang, Ruizhi
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Zabalza, Víctor
Germany, Heidelberg
Max-planck-institut Für Kernphysik
United Kingdom, Leicester
University of Leicester
Zacharias, Michael
Germany, Bochum
Ruhr-universitat Bochum
Zdziarski, Andrzej A.
Poland, Warsaw
Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences
Zech, Andreas
France, Paris
L'observatoire de Paris
Zechlin, Hannes
Germany, Hamburg
Universität Hamburg
Malyshev, Denys
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Statistics
Citations: 49
Authors: 195
Affiliations: 38
Identifiers
Doi:
10.1051/0004-6361/201322510
ISSN:
00046361
Research Areas
Environmental