Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CNRS IN2P3,CEA Irfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Dmytriiev, A. (författare)
PSL Res Univ, Univ Paris Diderot, Observ Paris, CNRS,LUTH, 5 Pl Jules Janssen, F-92190 Meudon, France.
Donath, A. (författare)
Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.
Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
Fuessling, M. (författare)
DESY, D-15738 Zeuthen, Germany.
Gabici, S. (författare)
Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CNRS IN2P3,CEA Irfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Gallant, Y. A. (författare)
Univ Montpellier, Lab Univers & Particules Montpellier, IN2P3, CNRS, CC 72,Pl Eugene Bataillon, F-34095 Montpellier 5, France.
Giavitto, G. (författare)
DESY, D-15738 Zeuthen, Germany.
Giunti, L. (författare)
Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CNRS IN2P3,CEA Irfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Nicolaus Copernicus Univ, Fac Phys Astron & Informat, Ctr Astron, Grudziadzka 5, PL-87100 Torun, Poland.
Katsuragawa, M. (författare)
Univ Tokyo, Univ Tokyo Inst Adv Study UTIAS, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan.
Katz, U. (författare)
Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
Khangulyan, D. (författare)
Rikkyo Univ, Dept Phys, Toshima Ku, 3-34-1 Nishi Ikebukuro, Tokyo 1718501, Japan.
Khelifi, B. (författare)
Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CNRS IN2P3,CEA Irfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Klepser, S. (författare)
DESY, D-15738 Zeuthen, Germany.
Kluzniak, W. (författare)
Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland.
Komin, Nu (författare)
Univ Witwatersrand, Sch Phys, 1 Jan Smuts Ave, ZA-2050 Johannesburg, South Africa.
Konno, R. (författare)
DESY, D-15738 Zeuthen, Germany.
Kosack, K. (författare)
Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France.
Kostunin, D. (författare)
DESY, D-15738 Zeuthen, Germany.
Kreter, M. (författare)
North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CNRS IN2P3,CEA Irfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CNRS IN2P3,CEA Irfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CNRS IN2P3,CEA Irfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Stawarz, L. (författare)
Uniwersytet Jagiellonski, Obserwatorium Astron, Ul Orla 171, PL-30244 Krakow, Poland.
Steenkamp, R. (författare)
Univ Namibia, Dept Phys, Private Bag 13301, Windhoek 12010, Namibia.
Univ Tokyo, Univ Tokyo Inst Adv Study UTIAS, Kavli Inst Phys & Math Universe WPI, 5-1-5 Kashiwa No Ha, Kashiwa, Chiba 2778583, Japan.
Tavernier, T. (författare)
Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France.
Taylor, A. M. (författare)
DESY, D-15738 Zeuthen, Germany.
Terrier, R. (författare)
Univ Paris Diderot, Observ Paris, Sorbonne Paris Cite, APC,AstroParticule & Cosmol,CNRS IN2P3,CEA Irfu, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France.
Tiziani, D. (författare)
Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa Inst Polytech Paris, Lab Leprince Ringuet, CNRS, Ecole Polytech, F-91128 Palaiseau, France. (creator_code:org_t)
Institute of Physics Publishing (IOPP), 2020
2020
Engelska.
Ingår i: Astrophysical Journal Letters. - : Institute of Physics Publishing (IOPP). - 2041-8205 .- 2041-8213. ; 894:2, s. 1-5
The detection of the first electromagnetic counterpart to the binary neutron star (BNS) merger remnant GW170817 established the connection between short gamma-ray bursts and BNS mergers. It also confirmed the forging of heavy elements in the ejecta (a so-called kilonova) via the r-process nucleosynthesis. The appearance of nonthermal radio and X-ray emission, as well as the brightening, which lasted more than 100 days, were somewhat unexpected. Current theoretical models attempt to explain this temporal behavior as either originating from a relativistic off-axis jet or a kilonova-like outflow. In either scenario, there is some ambiguity regarding how much energy is transported in the nonthermal electrons versus the magnetic field of the emission region. Combining the Very Large Array (radio) and Chandra (X-ray) measurements with observations in the GeV-TeV domain can help break this ambiguity, almost independently of the assumed origin of the emission. Here we report for the first time on deep H.E.S.S. observations of GW170817/GRB 170817A between 124 and 272 days after the BNS merger with the full H.E.S.S. array of telescopes, as well as on an updated analysis of the prompt (<5 days) observations with the upgraded H.E.S.S. phase-I telescopes. We discuss implications of the H.E.S.S. measurement for the magnetic field in the context of different source scenarios.