1. Department of Physics and Astronomy, University of Victoria, Victoria, BC V8W 3P2, Canada
2. Université de Strasbourg, CNRS, Observatoire astronomique de Strasbourg, UMR 7550, F-67000 Strasbourg, France
3. Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany
4. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
5. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
6. GEPI, Observatoire de Paris, Université PSL, CNRS, Place Jules Janssen, F-92195 Meudon, France
7. Université Cote d’Azur, Observatoire de la Cote d’Azur, CNRS, Laboratoire Lagrange, Bd de l’Observatoire, CS 34229, F-06304 Nice Cedex 4, France Observatoire de la Cote d’Azur, BP 4229, F-06304 Nice, France
8. Institute of Physics, Laboratoire d’astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire, CH-1290 Versoix, Switzerland
9. Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya st 48, 119017 Moscow, Russia
10. Department of Astronomy, University of Texas at Austin, Austin, TX 78712, USA
11. National Research Council Herzberg Astronomy and Astrophysics, 4071 West Saanich Road, Victoria, BC, V9E 2E7, Canada
12. Instituto de Astrofísica de Canarias, Via Láctea E-38205, La Laguna, Tenerife, Spain
13. Departamento de Astrofísica, Universidad de La Laguna, E-38206, La Laguna, Tenerife, Spain
14. UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UK
15. Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4, Canada
16. The Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, SE-10691 Stockholm, Sweden