1. Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland.
2. Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany.
3. High Energy Astrophysics Laboratory, Russian-Armenian University (RAU), 123 Hovsep Emin St Yerevan 0051, Armenia.
4. Landessternwarte, Universität Heidelberg, Königstuhl, D 69117 Heidelberg, Germany.
5. Aix Marseille Université, Centre national de la recherche scientifique (CNRS)/Institut National de Physique Nucléaire et Physique des Particules (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Marseille, France.
6. Laboratoire Leprince-Ringuet, École Polytechnique, CNRS, Institut Polytechnique de Paris, F-91128 Palaiseau, France.
7. University of Namibia, Department of Physics, Private Bag 13301, Windhoek 10005, Namibia.
8. Centre for Space Research, North-West University, Potchefstroom 2520, South Africa.
9. Instytut Fizyki Jdrowej Polskiej Akademii Nauk (PAN), ul. Radzikowskiego 152, 31-342 Kraków, Poland.
10. Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738, Germany.
11. School of Physics, University of the Witwatersrand, 1 Jan Smuts Avenue, Braamfontein, Johannesburg, 2050 South Africa.
12. Université de Paris, CNRS, Astroparticule et Cosmologie, F-75013 Paris, France.
13. Department of Physics and Electrical Engineering, Linnaeus University, 351 95 Växjö, Sweden.
14. Institut für Astronomie und Astrophysik, Universität Tübingen, Sand 1, D 72076 Tübingen, Germany.
15. Laboratoire Univers et Théories, Observatoire de Paris, Université PSL, CNRS, Université de Paris, 92190 Meudon, France.
16. Sorbonne Université, Université Paris Diderot, Sorbonne Paris Cité, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), 4 Place Jussieu, F-75252 Paris, France.
17. Université Savoie Mont Blanc, CNRS, Laboratoire d’Annecy de Physique des Particules - IN2P3, 74000 Annecy, France.
18. Institute for Research on the Fundamental Laws of the Universe (IRFU), Commisariat à l’énergie atomique (CEA), Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
19. University of Oxford, Department of Physics, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK.
20. Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24/25, D 14476 Potsdam, Germany.
21. School of Physical Sciences, University of Adelaide, Adelaide 5005, Australia.
22. Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D 91058 Erlangen, Germany.
23. Laboratoire Univers et Particules de Montpellier, Université Montpellier, CNRS/IN2P3, CC 72, Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France.
24. Université Bordeaux, CNRS, Laboratoire de Physique des Deux Infinis (LP2i), Bordeaux, Joint Research Unit (UMR 5797), F-33170 Gradignan, France.
25. Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, A-6020 Innsbruck, Austria.
26. Universität Hamburg, Institut für Experimentalphysik, Luruper Chaussee 149, D 22761 Hamburg, Germany.
27. Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul. Orla 171, 30-244 Kraków, Poland.
28. Institute of Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland.
29. Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan.
30. Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warsaw, Poland.
31. Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, D 12489 Berlin, Germany.
32. Department of Physics and Astronomy, The University of Leicester, University Road, Leicester, LE1 7RH, UK.
33. Gravitation and Astroparticle Physics at the University of Amsterdam (GRAPPA), Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands.
34. Yerevan Physics Institute, 2 Alikhanian Brothers St., 375036 Yerevan, Armenia.
35. Kavli Institute for the Physics and Mathematics of the Universe (World Premier International Research Center Initiative (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.
36. Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, Hyogo 658-8501, Japan.
37. Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
38. Department of Physics, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa.