1. University Observatory Munich, Scheinerstraße 1, D-81679 Munich, Germany
2. New York University Abu Dhabi, PO Box 129188, Saadiyat Island, Abu Dhabi, UAE
3. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
4. Max-Planck-Institut für Astrophysik, Karl-Schwarzschild Straße 1, D-85748 Garching, Germany
5. Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany
6. European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei München, Germany
7. Department of Astrophysics, University of Vienna, Türkenschanzstrasse 17, A-1180 Vienna, Austria
8. University of Western Australia, Crawley, WA 6009, Australia
9. Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, China