D. Berge^9,13, K. Bernlöhr², B. Bi¹⁴, M. Böttcher⁸, C. Boisson¹⁵, J. Bolmont¹⁶, M. de Bony de Lavergne¹⁷, J. Borowska¹³, M. Bouyahiaoui², R. Brose¹, A. Brown¹⁸, F. Brun¹⁷, B. Bruno¹⁹, T. Bulik²⁰, C. Burger-Scheidlin¹, T. Bylund¹⁷, S. Casanova²¹, J. Celic¹⁹, M. Cerruti¹¹, T. Chand⁸, S. Chandra⁸, A. Chen²², J. Chibueze⁸, O. Chibueze⁸, T. Collins¹⁰, G. Cotter¹⁸, J. Damascene Mbarubucyeye⁹, J. Devin²³, J. Djuvsland², A. Dmytriiev⁸, K. Egberts^10,*, S. Einecke²⁴, J.-P. Ernenwein²⁵, S. Fegan⁶, K. Feijen¹¹, G. Fontaine⁶, S. Funk¹⁹, S. Gabici¹¹, Y. A. Gallant²³, J. F. Glicenstein¹⁷, J. Glombitza¹⁹, G. Grolleron¹⁶, B. Heß¹⁴, W. Hofmann^2,*, T. L. Holch⁹, M. Holler²⁶, D. Horns²⁷, Zhiqiu Huang², M. Jamrozy²⁸, F. Jankowsky⁴, V. Joshi¹⁹, I. Jung-Richardt¹⁹, E. Kasai⁷, K. Katarzyński²⁹, D. Kerszberg¹⁶, R. Khatoon⁸, B. Khélifi¹¹, W. Kluźniak³⁰, Nu. Komin²², K. Kosack¹⁷, D. Kostunin⁹, A. Kundu⁸, R. G. Lang¹⁹, S. Le Stum²⁵, F. Leitl¹⁹, A. Lemière¹¹, M. Lemoine-Goumard³¹, J.-P. Lenain¹⁶, F. Leuschner¹⁴, A. Luashvili¹⁵, J. Mackey¹, D. Malyshev¹⁴, D. Malyshev¹⁹, V. Marandon¹⁷, P. Marinos²⁴, G. Martí-Devesa²⁶, R. Marx⁴, M. Meyer³², A. Mitchell¹⁹, R. Moderski³⁰, M. O. Moghadam¹⁰, L. Mohrmann², A. Montanari⁴, E. Moulin¹⁷, M. de Naurois^6,*, J. Niemiec²¹, S. Ohm⁹, L. Olivera-Nieto², E. de Ona Wilhelmi⁹, M. Ostrowski²⁸, S. Panny²⁶, M. Panter², D. Parsons¹³, U. Pensec¹⁶, G. Peron¹¹, G. Pühlhofer¹⁴, M. Punch¹¹, A. Quirrenbach⁴, S. Ravikularaman^11,2, M. Regeard¹¹, A. Reimer²⁶, O. Reimer²⁶, I. Reis¹⁷, H. Ren², B. Reville², F. Rieger², G. Rowell²⁴, B. Rudak³⁰, E. Ruiz-Velasco², V. Sahakian³⁶, H. Salzmann¹⁴, A. Santangelo¹⁴, M. Sasaki¹⁹, J. Schäfer¹⁹, F. Schüssler¹⁷, H. M. Schutte⁸, J. N. S. Shapopi⁷, A. Sharma¹¹, H. Sol¹⁵, S. Spencer¹⁹, Ł. Stawarz²⁸, S. Steinmassl², C. Steppa¹⁰, H. Suzuki³³, T. Takahashi³⁴, T. Tanaka³³, A. M. Taylor⁹, R. Terrier¹¹, M. Tsirou⁹, C. van Eldik¹⁹, M. Vecchi⁵, C. Venter⁸, J. Vink³⁵, T. Wach¹⁹, S. J. Wagner⁴, A. Wierzcholska²¹, M. Zacharias^4,8, A. A. Zdziarski³⁰, A. Zech¹⁵, and N. Żywucka⁸ (H.E.S.S. Collaboration)

• ¹Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland
• ²Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
• ³Yerevan State University, 1 Alek Manukyan Street, Yerevan 0025, Armenia
• ⁴Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany
• ⁵Kapteyn Astronomical Institute, University of Groningen, Landleven 12, 9747 AD Groningen, The Netherlands
• ⁶Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France
• ⁷University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia
• ⁸Centre for Space Research, North-West University, Potchefstroom 2520, South Africa
• ⁹Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany
• ¹⁰Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany
• ¹¹Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France
• ¹²Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden
• ¹³Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D 12489 Berlin, Germany
• ¹⁴Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany
• ¹⁵Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université Paris Cité, 5 place Jules Janssen, 92190 Meudon, France
• ¹⁶Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies, LPNHE, 4 place Jussieu, 75005 Paris, France
• ¹⁷IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
• ¹⁸Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
• ¹⁹Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Nikolaus-Fiebiger-Strasse 2, 91058 Erlangen, Germany
• ²⁰Astronomical Observatory, The University of Warsaw, Aleje Ujazdowskie 4, 00-478 Warsaw, Poland
• ²¹Instytut Fizyki Jądrowej PAN, ulica Radzikowskiego 152, 31-342 Kraków, Poland
• ²²School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg 2050, South Africa
• ²³Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France
• ²⁴School of Physical Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia
• ²⁵Aix Marseille Université, CNRS/IN2P3, CPPM, Marseille, France
• ²⁶Universität Innsbruck, Institut für Astro- und Teilchenphysik, Technikerstraße 25, 6020 Innsbruck, Austria
• ²⁷Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D 22761 Hamburg, Germany
• ²⁸Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ulica Orla 171, 30-244 Kraków, Poland
• ²⁹Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland
• ³⁰Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ulica Bartycka 18, 00-716 Warsaw, Poland
• ³¹Université Bordeaux, CNRS, LP2I Bordeaux, UMR 5797, F-33170 Gradignan, France
• ³²University of Southern Denmark, 5230 Odense, Denmark
• ³³Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, Hyogo 658-8501, Japan
• ³⁴Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa, Chiba 277-8583, Japan
• ³⁵GRAPPA, Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
• ³⁶Yerevan Physics Institute, 2 Alikhanian Brothers Street, 0036 Yerevan, Armenia

• ^*Contact author: contact.hess@hess-experiment.eu