Simultaneous observations of the blazar PKS 2155−304 from ultra-violet to TeV 
energies

H.E.S.S. Collaboration; Abdalla, H.; Adam, R.; Aharonian, F.; Ait Benkhali, Faical; Angüner, E. O.; Arakawa, M.; Arcaro, C.; Armand, C.; Ashkar, H.; Backes, M.; Barbosa Martins, V.; Barnard, M.; Becherini, Y.; Berge, D.; Bernlöhr, K.; Blackwell, R.; Böttcher, M.; Boisson, C.; Bolmont, J.; Bonnefoy, S.; Bregeon, J.; Breuhaus, M.; Brun, F.; Brun, P.; Bryan, M.; Büchele, M.; Bulik, T.; Bylund, T.; Capasso, M.; Caroff, S.; Carosi, A.; Casanova, S.; Cerruti, M.; Chand, T.; Chandra, S.; Chen, A.; Colafrancesco, S.; Curylo, M.; Davids, I. D.; Deil, C.; Devin, J.; deWilt, P.; Dirson, L.; Djannati-Ataï, A.; Dmytriiev, A.; Donath, A.; Doroshenko, V.; Drury, L. O'C.; Dyks, J.; Egberts, K.; Emery, G.; Ernenwein, J. -P.; Eschbach, S.; Feijen, K.; Fegan, S.; Fiasson, A.; Fontaine, G.; Funk, S.; Füßling, M.; Gabici, S.; Gallant, Y. A.; Gaté, F.; Giavitto, G.; Glawion, D.; Glicenstein, J. F.; Gottschall, D.; Grondin, M. -H.; Hahn, J.; Haupt, M.; Heinzelmann, G.; Henri, G.; Hermann, G.; Hinton, J. A.; Hofmann, W.; Hoischen, C.; Holch, T. L.; Holler, M.; Horns, D.; Huber, D.; Iwasaki, H.; Jamrozy, M.; Jankowsky, D.; Jankowsky, F.; Jardin-Blicq, A.; Jung-Richardt, I.; Kastendieck, M. A.; Katarzynski, K.; Katsuragawa, M.; Katz, U.; Khangulyan, D.; Khélifi, B.; King, J.; Klepser, S.; Kluzniak, W.; Komin, Nu.; Kosack, K.; Kostunin, D.; Kraus, M.; Lamanna, G.; Lau, J.; Lemière, A.; Lemoine-Goumard, M.; Lenain, J. -P.; Leser, E.; Levy, C.; Lohse, T.; Lypova, I.; Mackey, J.; Majumdar, J.; Malyshev, D.; Marandon, Vincent; Marcowith, A.; Mares, A.; Mariaud, C.; Martí-Devesa, G.; Marx, Ramin; Maurin, G.; Meintjes, P. J.; Mitchell, A.; Moderski, R.; Mohamed, M.; Mohrmann, L.; Muller, J.; Moore, C.; Moulin, E.; Murach, T.; Nakashima, S.; de Naurois, M.; Ndiyavala, H.; Niederwanger, F.; Niemiec, J.; Oakes, L.; O'Brien, P.; Odaka, H.; Ohm, S.; Wilhelmi, E. de Oña; Ostrowski, M.; Oya, I.; Panter, M.; Parsons, R. D.; Perennes, C.; Petrucci, P. -O.; Peyaud, B.; Piel, Q.; Pita, S.; Poireau, V.; Noel, A. Priyana; Prokhorov, D. A.; Prokoph, H.; Pühlhofer, G.; Punch, M.; Quirrenbach, A.; Raab, S.; Rauth, R.; Reimer, A.; Reimer, O.; Remy, Q.; Renaud, M.; Rieger, F.; Rinchiuso, L.; Romoli, C.; Rowell, G.; Rudak, B.; Ruiz-Velasco, E.; Sahakian, V.; Saito, S.; Sanchez, D. A.; Santangelo, A.; Sasaki, M.; Schlickeiser, R.; Schüssler, F.; Schulz, A.; Schutte, H.; Schwanke, U.; Schwemmer, S.; Seglar-Arroyo, M.; Senniappan, M.; Seyffert, A. S.; Shafi, N.; Shiningayamwe, K.; Simoni, R.; Sinha, A.; Sol, H.; Specovius, A.; Spir-Jacob, M.; Stawarz, L.; Steenkamp, R.; Stegmann, C.; Steppa, C.; Takahashi, T.; Tavernier, T.; Taylor, A. M.; Terrier, R.; Tiziani, D.; Tluczykont, M.; Trichard, C.; Tsirou, M.; Tsuji, N.; Tuffs, R.; Uchiyama, Y.; van der Walt, D. J.; van Eldik, C.; van Rensburg, C.; van Soelen, B.; Vasileiadis, G.; Veh, J.; Venter, C.; Vincent, P.; Vink, J.; Voisin, F.; Voelk, H. J.; Vuillaume, T.; Wadiasingh, Z.; Wagner, S. J.; White, R.; Wierzcholska, A.; Yang, R.; Yoneda, H.; Zacharias, M.; Zanin, R.; Zdziarski, A. A.; Zech, A.; Ziegler, A.; Zorn, J.; Zywucka, N.; Smith, P. S.

doi:10.1051/0004-6361/201936900

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Journal Article

Simultaneous observations of the blazar PKS 2155−304 from ultra-violet to TeV energies

MPS-Authors

/persons/resource/persons30244

Aharonian, F.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons73513

Ait Benkhali, Faical
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30300

Bernlöhr, K.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30369

Casanova, S.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30584

Hermann, G.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30597

Hinton, J. A.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30605

Hofmann, W.
Prof. Werner Hofmann, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons185147

Jardin-Blicq, A.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons37725

Marandon, Vincent
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons59477

Marx, Ramin
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons30878

Panter, M.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31117

Tuffs, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons31141

Voelk, H. J.
Prof. Heinrich J. Völk, Emeriti, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons146341

White, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons37755

Yang, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons216888

Zanin, R.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

/persons/resource/persons192818

Zorn, J.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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https://www.aanda.org/articles/aa/pdf/2020/07/aa36900-19.pdf
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Citation

H.E.S.S. Collaboration, Abdalla, H., Adam, R., Aharonian, F., Ait Benkhali, F., Angüner, E. O., et al. (2020). Simultaneous observations of the blazar PKS 2155−304 from ultra-violet to TeV energies. Astronomy and Astrophysics, 639: A42. doi:10.1051/0004-6361/201936900.

Cite as: https://hdl.handle.net/21.11116/0000-0007-69F3-1

Abstract

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.