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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
H.E.S.S. observations of the binary system PSR B1259-63/LS 2883 around the 2010/2011 periastron passage
Astronomy and Astrophysics, Volume 551, Article A94, Year 2013
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Description
Aims. We present very high energy (VHE; E > 100 GeV) data from the γ-ray binary system PSR B1259-63/LS 2883 taken around its periastron passage on 15th of December 2010 with the High Energy Stereoscopic System (H.E.S.S.) of Cherenkov Telescopes. We aim to search for a possible TeV counterpart of the GeV flare detected by the Fermi LAT. In addition, we aim to study the current periastron passage in the context of previous observations taken at similar orbital phases, testing the repetitive behaviour of the source. Methods. Observations at VHEs were conducted with H.E.S.S. from 9th to 16th of January 2011. The total dataset amounts to ~6 h of observing time. The data taken around the 2004 periastron passage were also re-analysed with the current analysis techniques in order to extend the energy spectrum above 3 TeV to fully compare observation results from 2004 and 2011. Results. The source is detected in the 2011 data at a significance level of 11.5σ revealing an averaged integral flux above 1 TeV of (1.01 ± 0.18stat ± 0.20sys) × 10-12 cm-2 s-1. The differential energy spectrum follows a power-law shape with a spectral index Γ = 2.92 ± 0.30stat ± 0.20sys and a flux normalisation at 1 TeV of N0 = (1.95 ± 0.32 stat ± 0.39sys) × 10-12 TeV -1 cm-2 s-1. The measured light curve does not show any evidence for variability of the source on the daily scale. The re-analysis of the 2004 data yields results compatible with the published ones. The differential energy spectrum measured up to ~10 TeV is consistent with a power law with a spectral index Γ = 2.81 ± 0.10stat ± 0.20sys and a flux normalisation at 1 TeV of N0 = (1.29 ± 0.08stat ± 0.26sys) × 10 -12 TeV-1 cm-2 s-1. Conclusions. The measured integral flux and the spectral shape of the 2011 data are compatible with the results obtained around previous periastron passages. The absence of variability in the H.E.S.S. data indicates that the GeV flare observed by Fermi LAT in the time period covered also by H.E.S.S. observations originates in a different physical scenario than the TeV emission. Moreover, the comparison of the new results to the results from the 2004 observations made at a similar orbital phase provides a stronger evidence of the repetitive behaviour of the source. © ESO, 2013.
Authors & Co-Authors
Abramowski, Attila
Germany, Hamburg
Universität Hamburg
Acero, Fabio
France, Montpellier
Laboratoire Univers et Particules de Montpellier
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
Akhperjanian, Ashot G.
Armenia, Yerevan
National Academy of Sciences of the Republic of Armenia
Armenia, Yerevan
Yerevan Physics Institute
Anton, Gisela K.Stycz
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
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
France, Gif-sur-yvette
Institut de Recherche Sur Les Lois Fondamentales de L'univers
Becherini, Yvonne
Germany, Heidelberg
Landessternwarte Heidelberg
France, Paris
Apc - Astroparticule et Cosmologie
France, Palaiseau
Laboratoire Leprince-ringuet
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
Biteau, Jonathan
France, Palaiseau
Laboratoire Leprince-ringuet
Boisson, Catherine
France, Meudon
Luth - Laboratoire de L'univers et de Ses Theories
Bolmont, Julien
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Bordas, Pol
Germany, Tubingen
Eberhard Karls Universität Tübingen
Brucker, Julia
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Brun, François
France, Palaiseau
Laboratoire Leprince-ringuet
Brun, Pierre
France, Gif-sur-yvette
Institut de Recherche Sur Les Lois Fondamentales de L'univers
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
Cerruti, Matteo
France, Meudon
Luth - Laboratoire de L'univers et de Ses Theories
Chadwick, Paula M.
United Kingdom, Durham
Durham University
Chaves, Ryan C.G.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
France, Gif-sur-yvette
Institut de Recherche Sur Les Lois Fondamentales de L'univers
Cheesebrough, A.
United Kingdom, Durham
Durham University
Colafrancesco, Sergio
South Africa, Johannesburg
University of the Witwatersrand
Cologna, Gabriele
Germany, Heidelberg
Landessternwarte Heidelberg
Conrad, Jan
Sweden, Stockholm
Albanova Universitetscentrum
Couturier, C.
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Dalton, Matthew L.
Germany, Berlin
Humboldt-universität zu Berlin
France, Gradignan
Lp2i - Laboratoire de Physique Des Deux Infinis Bordeaux
France
Funded by Contract Erc-stg-259391 from the European Community
Daniel, Michael K.
United Kingdom, Durham
Durham University
Davids, Isak Delberth
Namibia, Windhoek
University of Namibia
Degrange, Bernard
France, Palaiseau
Laboratoire Leprince-ringuet
Deil, Christoph
Germany, Heidelberg
Max-planck-institut Für Kernphysik
DeWilt, P.
Australia, Adelaide
School of Physical Sciences
Dickinson, Hugh J.
Sweden, Stockholm
Albanova Universitetscentrum
Djannati-Ataï, Arache
France, Paris
Apc - Astroparticule et Cosmologie
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, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
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
Egberts, Kathrin
Austria, Innsbruck
Universität Innsbruck
Eger, Peter A.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Espigat, P.
France, Paris
Apc - Astroparticule et Cosmologie
Fallon, Lisa
Ireland, Dublin
Institiúid Ard-lénn Bhaile Átha Cliath
Farnier, Christian
Sweden, Stockholm
Albanova Universitetscentrum
Fegan, Stephen J.
France, Palaiseau
Laboratoire Leprince-ringuet
Feinstein, Fabrice
France, Montpellier
Laboratoire Univers et Particules de Montpellier
Fernandes, Milton Virgílio
Germany, Hamburg
Universität Hamburg
Fernandez, Diane
France, Montpellier
Laboratoire Univers et Particules de Montpellier
Fiasson, Armand
France, Annecy
Laboratoire D'annecy-le-vieux de Physique Des Particules Lapp
Fontaine, Gérard
France, Palaiseau
Laboratoire Leprince-ringuet
Förster, Andreas
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Füssling, Matthias
Germany, Berlin
Humboldt-universität zu Berlin
Gajdus, Michael
Germany, Berlin
Humboldt-universität zu Berlin
Gallant, Yves A.
France, Montpellier
Laboratoire Univers et Particules de Montpellier
Garrigoux, Tania
France, Paris
Laboratoire de Physique Nucléaire et de Hautes Energies
Gast, Henning
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Giebels, Berrie
France, Palaiseau
Laboratoire Leprince-ringuet
Glicenstein, Jean François
France, Gif-sur-yvette
Institut de Recherche Sur Les Lois Fondamentales de L'univers
Glück, B.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Göring, D.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Grondin, Marie Hélène
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Germany, Heidelberg
Landessternwarte Heidelberg
Grudzínska, Mira
Poland, Warsaw
University of Warsaw
Häffner, Stephanie
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Hague, J. D.
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hahn, Joachim
Germany, Heidelberg
Max-planck-institut Für Kernphysik
Hampf, Daniel
Germany, Hamburg
Universität Hamburg
Harris, Jonathan
United Kingdom, Durham
Durham University
Heinz, Sebastian
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Heinzelmann, Götz
Germany, Hamburg
Universität Hamburg
Henri, Gilles
France, Saint Martin D'heres
Institut de Planétologie et D’astrophysique de Grenoble Ipag
Hermann, German
Germany, Heidelberg
Max-planck-institut Für Kernphysik
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
Laboratoire de Physique Nucléaire et de Hautes Energies
Jahn, C.
Germany, Erlangen
Friedrich-alexander-universität Erlangen-nürnberg
Jamrozy, Marek
Poland, Krakow
Uniwersytet Jagielloński
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
Landessternwarte Heidelberg
Khélifi, Bruno
France, Palaiseau
Laboratoire Leprince-ringuet
Klepser, Stefan
Germany, Hamburg
Deutsches Elektronen-synchrotron Desy
Klochkov, Dmitry K.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Kluåniak, 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, Annecy
Laboratoire D'annecy-le-vieux de Physique Des Particules Lapp
Kosack, Karl
France, Gif-sur-yvette
Institut de Recherche Sur Les Lois Fondamentales de L'univers
Kossakowski, Roman
France, Annecy
Laboratoire D'annecy-le-vieux de Physique Des Particules Lapp
Krayzel, Fabien
France, Annecy
Laboratoire D'annecy-le-vieux de Physique Des Particules Lapp
Statistics
Citations: 100
Authors: 100
Affiliations: 35
Identifiers
Doi:
10.1051/0004-6361/201220612
ISSN:
00046361
e-ISSN:
14320746
Research Areas
Environmental