1. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA
2. Department of Astronomy & Astrophysics, University of Chicago, Chicago, IL 606374, USA
3. DARK, Niels Bohr Institute, University of Copenhagen, Jagtvej 128, 2200 Copenhagen, Denmark
4. Kavli Institute for Particle Astrophysics and Cosmology and Department of Physics, Stanford University, Stanford, CA 94305, USA
5. Physics Department, UC Davis, 1 Shields Ave., Davis, CA 95616, USA
6. Carnegie Visiting Scientist
7. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
8. Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101, USA
9. MIT Kavli Institute for Astrophysics and Space Research, Cambridge, MA 02139, USA
10. Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany