1. Sternberg Astronomical Institute, M.V. Lomonosov Moscow State University, 13 Universitetsky Prospect, Moscow, 119234, Russia
2. Department of Physics, M.V. Lomonosov Moscow State University, 1, Leninskie Gory, Moscow, 119234, Russia
3. Smithsonian Astrophysical Observatory, 60 Garden St. MS09, Cambridge, MA, 02138, USA
4. European Southern Observatory, Alonso de Cordova 3107, Vitacura, Santiago, Chile
5. Department of Physics and Astronomy, University of Utah, 115 South 1400 East, Salt Lake City, UT 84112, USA
6. Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany
7. European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei München, Germany
8. Department of Physics and Astronomy, San José State University, San Jose, CA 95192, USA
9. University of California Observatories, 1156 High Street, Santa Cruz, CA 95064, USA
10. School of Mathematics and Physics, The University of Queensland, St. Lucia, QLD 4072, Australia
11. Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
12. ETH Zürich, Wolfgang-Pauli-Strasse 27, CH-8093 Zürich, Switzerland
13. Leibniz-Institut für Astrophysik Potsdam, AIP, An der Sternwarte 16, D-14482 Potsdam, Germany
14. Department of Physics and Astronomy, Macquarie University, NSW 2109, Australia
15. Australian Astronomical Observatory, PO Box 915, North Ryde, NSW 1670, Australia
16. George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA