1. Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, F-13388 Marseille, France
2. European Southern Observatory (ESO), Karl-Schwarzschild-Str.2, D-85748 Garching b. München, Germany
3. Department of Physics, Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK
4. GEPI, Observatoire de Paris, PSL Université, CNRS, 5 Place Jules Janssen, F-92190 Meudon, France
5. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
6. Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208, USA
7. Sterrewacht Leiden, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands
8. Department of Astronomy and Astrophysics, The Enrico Fermi Institute, University of Chicago, 5640 S. Ellis Ave, Chicago, IL 60637, USA