1. Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile
2. Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China
3. Chinese Academy of Sciences South America Center for Astronomy, Camino El Observatorio 1515, Las Condes, Santiago, Chile
4. Department of Astronomy, School of Physics, Peking University, Beijing 100871, China
5. Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK
6. Department of Physics, ETH Zurich, Wolfgang-Pauli-Str. 27, CH-8093 Zurich, Switzerland
7. Eureka Scientific Inc., 2452 Delmer St. Suite 100, Oakland, CA 94602, USA
8. Department of Astronomy, Kyoto University, Kyoto 606-8502, Japan
9. Department of Physics, Montana State University, Bozeman, MT 59717-3840, USA
10. Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, D-85741 Garching, Germany
11. Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile
12. Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, Colorado 80301, USA
13. Millenium Institute of Astrophysics, Santiago, Chile
14. Department of Astronomy and Joint Space-Science Institute, University of Maryland, College Park, MD 20742, USA
15. Institute for Particle Physics and Astrophysics, ETH Zurich, Wolfgang-Pauli-Str. 27, CH-8093 Zurich, Switzerland
16. Department of Astronomy, University of Geneva, ch. d’Ecogia 16, CH-1290 Versoix, Switzerland
17. Astrophysics Group, Department of Physics and Astronomy, University College London, 132 Hampstead Road, London NW1 2PS, UK