1. Department of Physics, ETH Zürich, Wolfgang-Pauli-Str 27, CH-8093 Zürich, Switzerland
2. Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany
3. Institute for Particle Physics and Astrophysics, ETH Zürich, Wolfgang-Pauli-Str 27, CH-8093 Zürich, Switzerland
4. Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, PT4150-762 Porto, Portugal
5. Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, The Netherlands
6. European Southern Observatory, Karl-Schwarzchild-Str. 2, D-85748 Garching bei München, Germany
7. Univ Lyon, Univ Lyon1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, F-69230 Saint-Genis-Laval, France
8. Subaru Telescope, National Astronomical Observatory of Japan, HI 96720 Hilo, USA
9. Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
10. Department of Physics & Astronomy, PO Box 1700 STN CSC, Victoria BC V8W 2Y2, Canada
11. Department of Physics, Simon Fraser University, 8888 University Dr, Burnaby BC, Canada