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Simultaneous observations of the blazar PKS 2155−304 from ultra-violet to TeV energies
MITCHELL, A. M. W.
Max-Planck-Institut für Kernphysik [MPIK]
Universität Zürich [Zürich] = University of Zurich [UZH]
Max-Planck-Institut für Kernphysik [MPIK]
Universität Zürich [Zürich] = University of Zurich [UZH]
TAKAHASHI, T.
Kavli Institute for the Physics and Mathematics of the Universe [The University of Tokyo] [UTIAS | Kavli IPMU]
< Réduire
Kavli Institute for the Physics and Mathematics of the Universe [The University of Tokyo] [UTIAS | Kavli IPMU]
Langue
en
Article de revue
Ce document a été publié dans
Astronomy and Astrophysics - A&A. 2020-07, vol. 639, p. A42
EDP Sciences
Résumé en anglais
Here we report the results of the first ever contemporaneous multi-wavelength observation campaign on the BL Lac object PKS 2155−304 involving Swift, NuSTAR, Fermi-LAT, and H.E.S.S. The use of these instruments allows us ...Lire la suite >
Here we report the results of the first ever contemporaneous multi-wavelength observation campaign on the BL Lac object PKS 2155−304 involving Swift, NuSTAR, Fermi-LAT, and H.E.S.S. The use of these instruments allows us to cover a broad energy range, which is important for disentangling the different radiative mechanisms. The source, observed from June 2013 to October 2013, was found in a low flux state with respect to previous observations but exhibited highly significant flux variability in the X-rays. The high-energy end of the synchrotron spectrum can be traced up to 40 keV without significant contamination by high-energy emission. A one-zone synchrotron self-Compton model was used to reproduce the broadband flux of the source for all the observations presented here but failed for previous observations made in April 2013. A lepto-hadronic solution was then explored to explain these earlier observational results.< Réduire
Mots clés en anglais
astroparticle physics
BL Lacertae objects: individual: PKS 2155−304
astroparticle physics
Origine
Importé de halUnités de recherche