1. MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 70 Vassar Street, Cambridge, MA 02139, USA
2. Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 8320165, RM, Chile
3. Millennium Institute of Astrophysics (MAS), Nuncio Monseñor Sótero Sanz 100, Providencia, Santiago, RM, Chile
4. Astrophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
5. Joint Space-Science Institute, University of Maryland, College Park, MD 20742, USA
6. Department of Physics & Astronomy, Wayne State University, 666 W Hancock St, Detroit, MI 48201, USA
7. Trottier Space Institute at McGill, 3550 University Street, Montreal, QC H3A 2T8, Canada
8. Department of Physics, McGill University, 3600 University Street, Montreal, QC H3A 2A7, Canada
9. Department of Physics and Astronomy, Haverford College, 370 Lancaster Avenue, Haverford, PA 19041, USA
10. Eureka Scientific, 2452 Delmer Street Suite 100, Oakland, CA 94602, USA
11. Department of Physics and Astronomy, West Virginia University, P.O. Box 6315, Morgantown, WV 26506, USA
12. Department of Physics & Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
13. Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St George Street, Toronto, ON M5S 3H8, Canada
14. Cahill Center for Astrophysics, California Institute of Technology, MC 249-17, 1200 E California Boulevard, Pasadena, CA 91125, USA
15. Department of Physics, University of Maryland, Baltimore County, Baltimore, MD 21250, USA
16. Center for Research and Exploration in Space Science and Technology, NASA/GSFC, Greenbelt, MD 20771, USA
17. Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
18. Department of Physics & Astronomy, Embry Riddle Aeronautical University, 3700 Willow Creek Road, Prescott, AZ 86301, USA
19. Observatorio Astronómico de Quito, Escuela Politécnica Nacional, Quito 170136, Ecuador
20. Department of Astronomy, University of Michigan, 1085 South University Avenue, Ann Arbor, MI 48109, USA
21. Department of Astronomy, Ohio State University, 140 W 18th Avenue, Columbus, OH 43210, USA
22. Instituto de Estudios Astrofísicos, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Avenida Ejercito Libertador 441, Santiago 8370191, RM, Chile
23. Department of Astronomy and Astrophysics, University of California at San Diego, La Jolla, CA 92093, USA
24. Department of Astronomy, Columbia University, New York, NY 10027, USA
25. Theoretical High Energy Astrophysics (THEA) Group, Columbia University, New York, NY 10027, USA
26. Department of Physics, University of Rome—Tor Vergata, via della Ricerca Scientifica 1, I-00100 Rome, Italy
27. Miller Institute for Basic Research in Science, 468 Donner Lab, Berkeley, CA 94720, USA
28. Department of Astronomy, University of California, Berkeley, CA 94720, USA