Affiliation: | Institute of Astronomy, Madingley Road, Cambridge CB3 0HA;Observatoire de Strasbourg, 11, rue de l'Université, F-67000 Strasbourg, France;Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, Postfach 1317, D-85741 Garching, Germany;Institute of Astronomy, School of Physics, A29, University of Sydney, NSW 2006, Australia;Physical Sciences, University of Hertfordshire, Hatfield AL10 9AB |