Hassan E. Abdalla, R. Adam, Felix A. Aharonian, F. Ait Benkhali, Ekrem Oǧuzhan Angüner, M. Arakawa, C. Arcaro, C. Armand, H. Ashkar, M. Backes, V. Barbosa Martins, M. Barnard, Y. Becherini, D. Berge, K. Bernloehr, R. Blackwell, M. Böttcher, C. Boisson, J. Bolmont, S. Bonnefoy, J. Bregeon, M. Breuhaus, F. Brun, P. Brun, M. Bryan, M. Büchele, T. Bulik, T. Bylund, M. Capasso, S. Caroff, A. Carosi, Sabrina Casanova, M. Cerruti, T. Chand, S. Chandra, A. Chen, S. Colafrancesco, M. Curylo, I. D. Davids, C. Deil, J. Devin, P. DeWilt, L. Dirson, A. Djannati-Ata, A. Dmytriiev, A. Donath, V Doroshenko, J. Dyks, Kathrin Egberts, G. Emery, J-P Ernenwein, S. Eschbach, K. Feijen, S. Fegan, A. Fiasson, G. Fontaine, S. Funk, Matthias Füßling, S. Gabici, Y. A. Gallant, F. Gate, G. Giavitto, D. Glawion, J. F. Glicenstein, D. Gottschall, M-H Grondin, J. Hahn, M. Haupt, G. Heinzelmann, G. Henri, G. Hermann, James Anthony Hinton, W. Hofmann, Clemens Hoischen, Tim Lukas Holch, M. Holler, D. Horns, D. Huber, H. Iwasaki, M. Jamrozy, D. Jankowsky, F. Jankowsky, A. Jardin-Blicq, I Jung-Richardt, M. A. Kastendieck, K. Katarzynski, M. Katsuragawa, U. Katz, D. Khangulyan, B. Khelifi, J. King, S. Klepser, W. Kluzniak, Nu Komin, K. Kosack, D. Kostunin, M. Kraus, G. Lamanna, J. Lau, A. Lemiere, M. Lemoine-Goumard, J-P Lenain, Eva Leser, C. Levy, T. Lohse, I Lypova, J. Mackey, J. Majumdar, D. Malyshev, V Marandon, Alexandre Marcowith, A. Mares, C. Mariaud, G. Marti-Devesa, R. Marx, G. Maurin, P. J. Meintjes, A. M. W. Mitchell, R. Moderski, M. Mohamed, L. Mohrmann, C. Moore, Emmanuel Moulin, J. Muller, T. Murach, S. Nakashima, M. de Naurois, H. Ndiyavala, F. Niederwanger, J. Niemiec, L. Oakes, H. Odaka, S. Ohm, E. de Ona Wilhelmi, M. Ostrowski, I Oya, M. Panter, R. D. Parsons, C. Perennes, P-O Petrucci, B. Peyaud, Q. Piel, S. Pita, V Poireau, A. Priyana Noel, D. A. Prokhorov, H. Prokoph, G. Pühlhofer, M. Punch, A. Quirrenbach, S. Raab, R. Rauth, A. Reimer, O. Reimer, Q. Remy, M. Renaud, F. Rieger, L. Rinchiuso, C. Romoli, G. Rowell, B. Rudak, E. Ruiz-Velasco, V Sahakian, S. Saito, David M. Sanchez, Andrea Santangelo, M. Sasaki, R. Schlickeiser, F. Schüssler, A. Schulz, H. Schutte, U. Schwanke, S. Schwemmer, M. Seglar-Arroyo, M. Senniappan, A. S. Seyffert, N. Shafi, K. Shiningayamwe, R. Simoni, A. Sinha, H. Sol, A. Specovius, M. Spir-Jacob, L. Stawarz, R. Steenkamp, Christian Stegmann, Constantin Beverly Steppa, T. Takahashi, T. Tavernier, A. M. Taylor, R. Terrier, D. Tiziani, M. Tluczykont, C. Trichard, M. Tsirou, N. Tsuji, R. Tuffs, Y. Uchiyama, D. J. van Der Walt, C. van Eldik, C. van Rensburg, B. van Soelen, G. Vasileiadis, J. Veh, C. Venter, P. Vincent, J. Vink, F. Voisin, H. J. Voelk, T. Vuillaume, Z. Wadiasingh, S. J. Wagner, R. White, A. Wierzcholska, R. Yang, H. Yoneda, Michael Zacharias, R. Zanin, A. A. Zdziarski, Alraune Zech, A. Ziegler, J. Zorn, N. Zywucka, M. Meyer
- The flat spectrum radio quasar 3C 279 is known to exhibit pronounced variability in the high-energy (100MeV < E < 100 GeV) gamma-ray band, which is continuously monitored with Fermi-LAT. During two periods of high activity in April 2014 and June 2015 target-of-opportunity observations were undertaken with the High Energy Stereoscopic System (H.E.S.S.) in the very-high-energy (VHE, E > 100 GeV) gamma-ray domain. While the observation in 2014 provides an upper limit, the observation in 2015 results in a signal with 8 : 7 sigma significance above an energy threshold of 66 GeV. No VHE variability was detected during the 2015 observations. The VHE photon spectrum is soft and described by a power-law index of 4.2 +/- 0.3. The H.E.S.S. data along with a detailed and contemporaneous multiwavelength data set provide constraints on the physical parameters of the emission region. The minimum distance of the emission region from the central black hole was estimated using two plausible geometries of the broad-line region and three potentialThe flat spectrum radio quasar 3C 279 is known to exhibit pronounced variability in the high-energy (100MeV < E < 100 GeV) gamma-ray band, which is continuously monitored with Fermi-LAT. During two periods of high activity in April 2014 and June 2015 target-of-opportunity observations were undertaken with the High Energy Stereoscopic System (H.E.S.S.) in the very-high-energy (VHE, E > 100 GeV) gamma-ray domain. While the observation in 2014 provides an upper limit, the observation in 2015 results in a signal with 8 : 7 sigma significance above an energy threshold of 66 GeV. No VHE variability was detected during the 2015 observations. The VHE photon spectrum is soft and described by a power-law index of 4.2 +/- 0.3. The H.E.S.S. data along with a detailed and contemporaneous multiwavelength data set provide constraints on the physical parameters of the emission region. The minimum distance of the emission region from the central black hole was estimated using two plausible geometries of the broad-line region and three potential intrinsic spectra. The emission region is confidently placed at r greater than or similar to 1 : 7 X 1017 cm from the black hole, that is beyond the assumed distance of the broad-line region. Time-dependent leptonic and lepto-hadronic one-zone models were used to describe the evolution of the 2015 flare. Neither model can fully reproduce the observations, despite testing various parameter sets. Furthermore, the H.E.S.S. data were used to derive constraints on Lorentz invariance violation given the large redshift of 3C 279.…
MetadatenVerfasserangaben: | Hassan E. AbdallaORCiDGND, R. Adam, Felix A. AharonianORCiDGND, F. Ait Benkhali, Ekrem Oǧuzhan AngünerGND, M. Arakawa, C. Arcaro, C. Armand, H. Ashkar, M. Backes, V. Barbosa Martins, M. Barnard, Y. Becherini, D. Berge, K. Bernloehr, R. Blackwell, M. Böttcher, C. Boisson, J. Bolmont, S. Bonnefoy, J. Bregeon, M. Breuhaus, F. Brun, P. Brun, M. Bryan, M. Büchele, T. Bulik, T. Bylund, M. Capasso, S. Caroff, A. Carosi, Sabrina CasanovaGND, M. Cerruti, T. Chand, S. Chandra, A. Chen, S. Colafrancesco, M. Curylo, I. D. Davids, C. Deil, J. Devin, P. DeWilt, L. Dirson, A. Djannati-Ata, A. Dmytriiev, A. Donath, V DoroshenkoORCiD, J. Dyks, Kathrin EgbertsGND, G. Emery, J-P Ernenwein, S. Eschbach, K. Feijen, S. Fegan, A. Fiasson, G. Fontaine, S. Funk, Matthias Füßling, S. Gabici, Y. A. Gallant, F. Gate, G. Giavitto, D. Glawion, J. F. Glicenstein, D. Gottschall, M-H Grondin, J. Hahn, M. Haupt, G. Heinzelmann, G. Henri, G. Hermann, James Anthony HintonGND, W. Hofmann, Clemens HoischenORCiDGND, Tim Lukas HolchORCiD, M. Holler, D. Horns, D. Huber, H. Iwasaki, M. Jamrozy, D. Jankowsky, F. Jankowsky, A. Jardin-Blicq, I Jung-Richardt, M. A. Kastendieck, K. Katarzynski, M. Katsuragawa, U. Katz, D. Khangulyan, B. Khelifi, J. King, S. Klepser, W. Kluzniak, Nu Komin, K. Kosack, D. Kostunin, M. Kraus, G. Lamanna, J. Lau, A. Lemiere, M. Lemoine-Goumard, J-P Lenain, Eva LeserORCiDGND, C. Levy, T. Lohse, I Lypova, J. Mackey, J. Majumdar, D. Malyshev, V Marandon, Alexandre MarcowithORCiD, A. Mares, C. Mariaud, G. Marti-Devesa, R. Marx, G. Maurin, P. J. Meintjes, A. M. W. Mitchell, R. Moderski, M. Mohamed, L. Mohrmann, C. Moore, Emmanuel Moulin, J. Muller, T. Murach, S. Nakashima, M. de Naurois, H. Ndiyavala, F. Niederwanger, J. Niemiec, L. Oakes, H. Odaka, S. Ohm, E. de Ona Wilhelmi, M. Ostrowski, I Oya, M. Panter, R. D. Parsons, C. Perennes, P-O Petrucci, B. Peyaud, Q. Piel, S. Pita, V Poireau, A. Priyana Noel, D. A. Prokhorov, H. Prokoph, G. Pühlhofer, M. Punch, A. Quirrenbach, S. Raab, R. Rauth, A. Reimer, O. Reimer, Q. Remy, M. Renaud, F. Rieger, L. Rinchiuso, C. Romoli, G. Rowell, B. Rudak, E. Ruiz-Velasco, V Sahakian, S. Saito, David M. SanchezORCiD, Andrea Santangelo, M. Sasaki, R. Schlickeiser, F. Schüssler, A. Schulz, H. Schutte, U. Schwanke, S. Schwemmer, M. Seglar-Arroyo, M. Senniappan, A. S. Seyffert, N. Shafi, K. Shiningayamwe, R. Simoni, A. Sinha, H. Sol, A. Specovius, M. Spir-Jacob, L. Stawarz, R. Steenkamp, Christian StegmannORCiDGND, Constantin Beverly SteppaORCiD, T. Takahashi, T. Tavernier, A. M. Taylor, R. Terrier, D. Tiziani, M. Tluczykont, C. Trichard, M. Tsirou, N. Tsuji, R. Tuffs, Y. Uchiyama, D. J. van Der Walt, C. van Eldik, C. van Rensburg, B. van Soelen, G. Vasileiadis, J. Veh, C. Venter, P. Vincent, J. Vink, F. Voisin, H. J. Voelk, T. Vuillaume, Z. Wadiasingh, S. J. Wagner, R. White, A. Wierzcholska, R. Yang, H. Yoneda, Michael ZachariasORCiDGND, R. Zanin, A. A. Zdziarski, Alraune ZechORCiD, A. Ziegler, J. Zorn, N. Zywucka, M. Meyer |
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DOI: | https://doi.org/10.1051/0004-6361/201935704 |
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ISSN: | 1432-0746 |
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Titel des übergeordneten Werks (Englisch): | Astronomy and astrophysics : an international weekly journal |
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Verlag: | EDP Sciences |
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Verlagsort: | Les Ulis |
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Publikationstyp: | Wissenschaftlicher Artikel |
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Sprache: | Englisch |
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Datum der Erstveröffentlichung: | 16.07.2019 |
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Erscheinungsjahr: | 2019 |
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Urhebende Körperschaft: | HESS Collaboration |
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Datum der Freischaltung: | 07.01.2021 |
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Freies Schlagwort / Tag: | galaxies: active; quasars: individual: 3C 279; radiation mechanisms: non-thermal; relativistic processes |
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Band: | 627 |
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Seitenanzahl: | 19 |
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Fördernde Institution: | German Ministry for Education and Research (BMBF)Federal Ministry of Education & Research (BMBF); Max Planck SocietyMax Planck SocietyFoundation CELLEX; German Research Foundation (DFG)German Research Foundation (DFG); Helmholtz AssociationHelmholtz Association; Alexander von Humboldt FoundationAlexander von Humboldt Foundation; French Ministry of Higher Education, Research and Innovation [CNRS/IN2P3]; (CNRS/INSU)Centre National de la Recherche Scientifique (CEA)French Atomic Energy Commission; U.K. Science and Technology Facilities Council (STFC)Science & Technology Facilities Council (STFC); Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation; National Science Centre, Poland [2016/22/M/ST9/00382]; National Research Foundation; University of Namibia; National Commission on Research, Science & Technology of Namibia (NCRST); Austrian Federal Ministry of Education, Science and Research; Austrian Science Fund (FWF)Austrian Science Fund (FWF); Australian Research Council (ARC)Australian Research Council; University of Amsterdam; EGI Federation; Polish National Agency for Academic Exchange (NAWA); National Aeronautics and Space AdministrationNational Aeronautics & Space Administration (NASA) |
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Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
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DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
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Peer Review: | Referiert |
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Publikationsweg: | Open Access / Green Open-Access |
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