1. Department of Physics, University of California, Davis, CA 95616, USA
2. Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
3. Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA
4. Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT, UK
5. Department of Astronomy/Steward Observatory, 933 North Cherry Avenue, Rm. N204, Tucson, AZ 85721-0065, USA
6. Max-Planck Institut für Astrophysik, Karl-Schwarzschild Str 1, D-85748 Garching, Germany
7. School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK
8. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, UK
9. The Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel
10. School of Physics, O’Brien Centre for Science North, University College Dublin, Belfield, Dublin 4, Ireland
11. Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile
12. Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001, Israel
13. PITT PACC, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA
14. Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA
15. Las Cumbres Observatory, 6740 Cortona Dr Ste 102, Goleta, CA 93117-5575, USA
16. Astrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast BT7 1NN, UK
17. Tuorla Observatory, Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
18. SRON Netherlands Institute for Space Research, Sorbonnelaan 2, NL-3584 CA Utrecht, the Netherlands
19. Department of Astrophysics/IMAPP, Radboud University, P.O. Box 9010, NL-6500 GL Nijmegen, the Netherlands
20. Departamento de Ciencias Fisicas, Universidad Andres Bello, Avda. Republica 252, Santiago, Chile
21. Millennium Institute of Astrophysics (MAS), Nuncio Monseñor Sótero Sanz 100, Providencia, Santiago, Chile
22. The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA