1. Department of Astronomy & Astrophysics, The University of Chicago, Chicago, IL 60637, USA
2. The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA
3. Department of Astrophysics, Princeton University, Princeton, NJ 08544, USA
4. Department of Physics, ETH Wolfgang-Pauli-Strasse 27, 8093, CH-8093 Zürich, Switzerland
5. Department of Physics and Astronomy, University of Hawai’i at Hilo, Hilo, HI 96720, USA
6. Department of Physics & Astronomy and Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University, 1800 Sherman Ave, Evanston, IL 60201, USA
7. Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile
8. Laboratory For Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA
9. Institut d’Astrophysique de Paris, CNRS-SU, UMR 7095, 98bis bd Arago, Paris F-75014, France
10. Department of Astronomy, Columbia University, New York, NY 10027, USA
11. Space Telescope Science Institute, Baltimore, MD 21218, USA
12. Department of Physics & Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA
13. Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands
14. MIT-Kavli Institute for Astrophysics and Space Research, 77 Massachusetts Ave., Cambridge, MA 02139, USA
15. Steward Observatory, University of Arizona, Tucson, AZ 85721, USA