Affiliation: | European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany;Research School of Astronomy &Astrophysics, Australian National University, Cotter Road, Weston, ACT 2611, Australia;Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ;H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL;Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile |