1. ASI - Agenzia Spaziale Italiana , Via del Politecnico snc, I-00133 Roma, Italy
2. INAF Istituto di Astrofisica e Planetologia Spaziali , Via del Fosso del Cavaliere 100, I-00133 Roma, Italy
3. Astronomical Institute of the Czech Academy of Sciences , Bocní II 1401/1, 14100 Praha 4, Czech Republic
4. Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre , Via della Vasca Navale 84, I-00146 Roma, Italy
5. University de Strasbourg, CNRS, Observatoire Astronomique de Strasbourg , UMR 7550, F-67000 Strasbourg, France
6. Space Science Data Center, Agenzia Spaziale Italiana , Via del Politecnico snc, I-00133 Roma, Italy
7. INAF Osservatorio Astronomico di Roma , Via Frascati 33, I-00078 Monte Porzio Catone (RM), Italy
8. MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139, USA
9. Istituto Nazionale di Fisica Nucleare , Sezione di Pisa, Largo B. Pontecorvo 3, I-56127 Pisa, Italy
10. Dipartimento di Fisica, Università di Pisa , Largo B. Pontecorvo 3, I-56127 Pisa, Italy
11. Physics Department and McDonnell Center for the Space Sciences, Washington University in St. Louis , St. Louis, MO 63130, USA
12. School of Mathematics, Statistics, and Physics, Newcastle University , Newcastle upon Tyne NE1 7RU, UK
13. Department of Physics and Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305, USA
14. Université Grenoble Alpes, CNRS, IPAG , F-38000 Grenoble, France
15. Astronomical Institute , Charles University, V Holesovickach 2, CZ-18000 Prague, Czech Republic
16. Dipartimento di Fisica, Università degli Studi di Roma ‘Tor Vergata’ , Via della Ricerca Scientifica 1, I-00133 Roma, Italy
17. Istituto Nazionale di Fisica Nucleare, Sezione di Roma ‘Tor Vergata’ , Via della Ricerca Scientifica 1, I-00133 Roma, Italy
18. Department of Astronomy, University of Maryland , College Park, MD 20742, USA
19. Department of Physics and Astronomy , FI-20014 University of Turku, Finland
20. Nordita, KTH Royal Institute of Technology and Stockholm University , Hannes Alfvéns väg 12, SE-10691 Stockholm, Sweden
21. Space Research Institute of the Russian Academy of Sciences , Profsoyuznaya Str. 84/32, Moscow 117997, Russia
22. National Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Beijing 100101, China
23. Instituto de Astrofísica de Andalucía-CSIC , Glorieta de la Astronomía s/n, E-18008 Granada, Spain
24. INAF Osservatorio Astronomico di Cagliari , Via della Scienza 5, I-09047 Selargius (CA), Italy
25. NASA Marshall Space Flight Center , Huntsville, AL 35812, USA
26. Istituto Nazionale di Fisica Nucleare , Sezione di Torino, Via Pietro Giuria 1, I-10125 Torino, Italy
27. Dipartimento di Fisica, Università degli Studi di Torino , Via Pietro Giuria 1, I-10125 Torino, Italy
28. INAF Osservatorio Astrofisico di Arcetri , Largo Enrico Fermi 5, I-50125 Firenze, Italy
29. Dipartimento di Fisica e Astronomia, Università degli Studi di Firenze , Via Sansone 1, I-50019 Sesto Fiorentino (FI), Italy
30. Istituto Nazionale di Fisica Nucleare , Sezione di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino (FI), Italy
31. Institut für Astronomie und Astrophysik, Universität Tübingen , Sand 1, D-72076 Tübingen, Germany
32. RIKEN Cluster for Pioneering Research , 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
33. California Institute of Technology , Pasadena, CA 91125, USA
34. Yamagata University , 1-4-12 Kojirakawa-machi, Yamagata-shi 990-8560, Japan
35. Osaka University , 1-1 Yamadaoka, Suita, Osaka 565-0871, Japan
36. University of British Columbia , Vancouver, BC V6T 1Z4, Canada
37. Department of Physics, Faculty of Science and Engineering , Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
38. Institute for Astrophysical Research, Boston University , 725 Commonwealth Avenue, Boston, MA 02215, USA
39. Department of Astrophysics, St. Petersburg State University , Universitetsky pr. 28, Petrodvoretz, 198504 St. Petersburg, Russia
40. Finnish Centre for Astronomy with ESO , 20014 University of Turku, Finland
41. Graduate School of Science, Division of Particle and Astrophysical Science, Nagoya University , Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
42. Hiroshima Astrophysical Science Center, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
43. Department of Physics, The University of Hong Kong , Pokfulam, C694+RP Ma Liu Shui, Hong Kong
44. Department of Astronomy and Astrophysics, Pennsylvania State University , University Park, PA 16802, USA
45. Center for Astrophysics | Harvard & Smithsonian , 60 Garden St, Cambridge, MA 02138, USA
46. INAF Osservatorio Astronomico di Brera , Via E. Bianchi 46, I-23807 Merate (LC), Italy
47. Dipartimento di Fisica e Astronomia, Università degli Studi di Padova , Via Marzolo 8, I-35131 Padova, Italy
48. Mullard Space Science Laboratory, University College London , Holmbury St Mary, Dorking, Surrey RH5 6NT, UK
49. Anton Pannekoek Institute for Astronomy & GRAPPA, University of Amsterdam , Science Park 904, NL-1098 XH Amsterdam, the Netherlands
50. Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology , Guangxi University, Nanning 530004, China