1. Laboratory of Astrophysics, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny , CH-1290 Versoix , Switzerland
2. Department of Astronomy, Tsinghua University , Beijing 100084 , China
3. Departamento de Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid , E-28049 Madrid , Spain
4. Centro de Investigación Avanzada en Física Fundamental (CIAFF), Facultad de Ciencias, Universidad Autónoma de Madrid , E-28049 Madrid , Spain
5. Department of Physics and Astronomy, University of Utah, Salt Lake City , UT 84112 , USA
6. IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette , France
7. LAM (Laboratoire d’Astrophysique de Marseille), Aix Marseille Université, CNRS , UMR 7326, F13388, Marseille , France
8. Perimeter Institute for Theoretical Physics , 31 Caroline St. North, Waterloo, ON N2L 2Y5 , Canada
9. Waterloo Centre for Astrophysics, University of Waterloo , Waterloo, ON N2L 3G1 , Canada
10. Department of Physics and Astronomy, University of Waterloo , 200 University Avenue W, Waterloo, ON N2L 3G1 , Canada
11. Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210 , USA
12. Physics Department, Stanford University , 382 Via Pueblo Mall, Stanford, CA 94305 , USA
13. Physics Department, Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Stanford, CA 94305 , USA
14. SLAC National Accelerator Laboratory , Menlo Park, CA 94025 , USA
15. Department of Physics, Kansas State University , 116 Cardwell Hall, Manhattan, KS 66506 , USA
16. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USA
17. Physics Department, Boston University , 590 Commonwealth Avenue, Boston, MA 02215 , USA
18. Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT , UK
19. Departamento de Física, Universidad de Guanajuato–DCI , C.P. 37150, Leon, Guanajuato , México
20. Department of Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210 , USA
21. Institut de Física d’Altes Energies(IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra Barcelona , Spain
22. Departamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá , Colombia
23. Department of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275 , USA
24. Serra Húnter Fellow, Departament de Física, Universitat Auònoma de Barcelona , 08193 Bellaterra (Barcelona) , Spain
25. Department of Astronomy, The Ohio State University , 140 W. 18th Ave., Columbus, OH 43210 , USA
26. NSF’s National Optical-Infrared Astronomy Research Laboratory , 950 N. Cherry Avenue, Tucson, AZ 85719 , USA
27. Institució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys , 23, E-08010 Barcelona , Spain
28. Department of Physics and Astronomy , Siena College, 515 Loudon Road, Loudonville, NY 12211 , USA
29. National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100101 , People’s Republic of China
30. Space Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720 , USA
31. University of California , Berkeley, 110 Sproul Hall no. 5800 Berkeley, CA 94720 , USA
32. Department of Physics and Astronomy, Sejong University , Seoul 143-747 , Korea
33. Department of Physics and Astronomy, Ohio University, Athens , OH 45701 , USA
34. Department of Physics, University of Michigan , Ann Arbor, MI 48109 , USA