Affiliation: | Laboratoire Cassiopée, CNRS, Observatoire de la Côte d'Azur, B.P. 4229, F-06304 Nice, France; Department of Physics, University of Padova, Via Marzolo 8, 35131 Padova, Italy; Stockholm Observatory, Albanova Universitetcentrum, SE-10691 Stockholm, Sweden;Observatoire de Paris, Section de Meudon, F-92195 Meudon Principal Cedex, France |