Institution: | Observatoire de Strasbourg, 11 rue de l'Université, F-67000 Strasbourg, France;Institute of Astronomy, School of Physics, A29, University of Sydney, NSW 2006, Australia;INAF –Osservatorio Astronomico di Bologna, Via Ranzani 1, 40127 Bologna, Italy;Institute of Astronomy, Madingley Road, Cambridge CB3 0HA |