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Revealing x-ray and gamma ray temporal and spectral similarities in the GRB 190829A afterglow.
Abdalla, H; Aharonian, F; Ait Benkhali, F; Angüner, E O; Arcaro, C; Armand, C; Armstrong, T; Ashkar, H; Backes, M; Baghmanyan, V; Barbosa Martins, V; Barnacka, A; Barnard, M; Becherini, Y; Berge, D; Bernlöhr, K; Bi, B; Bissaldi, E; Böttcher, M; Boisson, C; Bolmont, J; de Bony de Lavergne, M; Breuhaus, M; Brun, F; Brun, P; Bryan, M; Büchele, M; Bulik, T; Bylund, T; Caroff, S; Carosi, A; Casanova, S; Chand, T; Chandra, S; Chen, A; Cotter, G; Curylo, M; Damascene Mbarubucyeye, J; Davids, I D; Davies, J; Deil, C; Devin, J; Dirson, L; Djannati-Ataï, A; Dmytriiev, A; Donath, A; Doroshenko, V; Dreyer, L; Duffy, C; Dyks, J.
Afiliação
  • Abdalla H; University of Namibia, Department of Physics, Windhoek 10005, Namibia.
  • Aharonian F; Dublin Institute for Advanced Studies, Dublin 2, Ireland. contact.hess@hess-experiment.eu andrew.taylor@desy.de felix.aharonian@mpi-hd.mpg.de cromoli@mpi-hd.mpg.de d.khangulyan@rikkyo.ac.jp edna.ruiz@mpi-hd.mpg.de fabian.schussler@cea.fr sylvia.zhu@desy.de.
  • Ait Benkhali F; Max-Planck-Institut für Kernphysik, D 69029 Heidelberg, Germany.
  • Angüner EO; High Energy Astrophysics Laboratory, Russian-Armenian University (RAU), Yerevan 0051, Armenia.
  • Arcaro C; Max-Planck-Institut für Kernphysik, D 69029 Heidelberg, Germany.
  • Armand C; Aix Marseille Université, Centre national de la recherche scientifique (CNRS)/Institut National de Physique Nucléaire et Physique des Particules (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Marseille, France.
  • Armstrong T; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
  • Ashkar H; Laboratoire d'Annecy de Physique des Particules (LAPP), Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, 74000 Annecy, France.
  • Backes M; University of Oxford, Department of Physics, Denys Wilkinson Building, Oxford OX1 3RH, UK.
  • Baghmanyan V; Institute for Research on the Fundamental Laws of the Universe (IRFU), Commissariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
  • Barbosa Martins V; University of Namibia, Department of Physics, Windhoek 10005, Namibia.
  • Barnacka A; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
  • Barnard M; Instytut Fizyki Jadrowej Polskiej Akademii Nauk (PAN), 31-342 Kraków, Poland.
  • Becherini Y; Deutsches Elektronen-Synchrotron (DESY), D-15738 Zeuthen, Germany.
  • Berge D; Obserwatorium Astronomiczne, Uniwersytet Jagiellonski, 30-244 Kraków, Poland.
  • Bernlöhr K; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
  • Bi B; Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden.
  • Bissaldi E; Deutsches Elektronen-Synchrotron (DESY), D-15738 Zeuthen, Germany.
  • Böttcher M; Max-Planck-Institut für Kernphysik, D 69029 Heidelberg, Germany.
  • Boisson C; Institut für Astronomie und Astrophysik, Universität Tübingen, D 72076 Tübingen, Germany.
  • Bolmont J; Dipartimento Interateneo di Fisica, Politecnico di Bari, 70125 Bari, Italy.
  • de Bony de Lavergne M; Istituto Nazionale di Fisica Nucleare, Sezione di Bari, 70125 Bari, Italy.
  • Breuhaus M; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
  • Brun F; Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France.
  • Brun P; Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), F-75252 Paris, France.
  • Bryan M; Laboratoire d'Annecy de Physique des Particules (LAPP), Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, 74000 Annecy, France.
  • Büchele M; Max-Planck-Institut für Kernphysik, D 69029 Heidelberg, Germany.
  • Bulik T; Institute for Research on the Fundamental Laws of the Universe (IRFU), Commissariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
  • Bylund T; Institute for Research on the Fundamental Laws of the Universe (IRFU), Commissariat à l'énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
  • Caroff S; Gravitation and Astroparticle Physics at the University of Amsterdam (GRAPPA), Anton Pannekoek Institute for Astronomy, University of Amsterdam, 1098 XH Amsterdam, Netherlands.
  • Carosi A; Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, D 91058 Erlangen, Germany.
  • Casanova S; Astronomical Observatory, The University of Warsaw, 00-478 Warsaw, Poland.
  • Chand T; Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden.
  • Chandra S; Laboratoire d'Annecy de Physique des Particules (LAPP), Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, 74000 Annecy, France.
  • Chen A; Laboratoire d'Annecy de Physique des Particules (LAPP), Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, 74000 Annecy, France.
  • Cotter G; Max-Planck-Institut für Kernphysik, D 69029 Heidelberg, Germany.
  • Curylo M; Instytut Fizyki Jadrowej Polskiej Akademii Nauk (PAN), 31-342 Kraków, Poland.
  • Damascene Mbarubucyeye J; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
  • Davids ID; Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
  • Davies J; School of Physics, University of the Witwatersrand, Braamfontein, Johannesburg 2050, South Africa.
  • Deil C; University of Oxford, Department of Physics, Denys Wilkinson Building, Oxford OX1 3RH, UK.
  • Devin J; Astronomical Observatory, The University of Warsaw, 00-478 Warsaw, Poland.
  • Dirson L; Deutsches Elektronen-Synchrotron (DESY), D-15738 Zeuthen, Germany.
  • Djannati-Ataï A; University of Namibia, Department of Physics, Windhoek 10005, Namibia.
  • Dmytriiev A; University of Oxford, Department of Physics, Denys Wilkinson Building, Oxford OX1 3RH, UK.
  • Donath A; Max-Planck-Institut für Kernphysik, D 69029 Heidelberg, Germany.
  • Doroshenko V; Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France.
  • Dreyer L; Universität Hamburg, Institut für Experimentalphysik, D 22761 Hamburg, Germany.
  • Duffy C; Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France.
  • Dyks J; Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France.
Science ; 372(6546): 1081-1085, 2021 06 04.
Article em En | MEDLINE | ID: mdl-34083487
ABSTRACT
Gamma-ray bursts (GRBs), which are bright flashes of gamma rays from extragalactic sources followed by fading afterglow emission, are associated with stellar core collapse events. We report the detection of very-high-energy (VHE) gamma rays from the afterglow of GRB 190829A, between 4 and 56 hours after the trigger, using the High Energy Stereoscopic System (H.E.S.S.). The low luminosity and redshift of GRB 190829A reduce both internal and external absorption, allowing determination of its intrinsic energy spectrum. Between energies of 0.18 and 3.3 tera-electron volts, this spectrum is described by a power law with photon index of 2.07 ± 0.09, similar to the x-ray spectrum. The x-ray and VHE gamma-ray light curves also show similar decay profiles. These similar characteristics in the x-ray and gamma-ray bands challenge GRB afterglow emission scenarios.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article