1. Kavli IPMU (WPI), The University of Tokyo Institutes for Advanced Study, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
2. UCO/Lick Observatory, University of California, Santa Cruz, 1156 High St., Santa Cruz, CA 95064, USA
3. Department of Astronomy, University of Wisconsin-Madison, 475N. Charter St., Madison, WI 53703, USA
4. School of Physics and Astronomy, University of St Andrews, North Haugh, St. Andrews KY16 9SS, UK
5. Haverford College, Department of Physics and Astronomy, 370 Lancaster Avenue, Haverford, PA 19041, USA
6. Institute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UK
7. Sub-department of Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
8. Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands
9. Institut d’Astrophysique Spatiale, Université Paris-XI, 91405 Orsay, France
10. Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada
11. Apache Point Observatory, PO Box 59, Sunspot, NM 88349, USA
12. Special Astrophysical Observatory of the RAS, 369167 Nizhnij Arkhyz, Russia
13. McDonald Observatory, The University of Texas at Austin, 1 University Station, Austin, TX 78712, USA
14. Departamento de Fisica, Facultad de Ciencias, Universidad de La Serena, Cisternas 1200, La Serena 1700000, Chile
15. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA