Affiliation: | Observatoire de Besançon, BP 1615, 25010 Besançon cedex, France;Harvard-Smithsonian Center for Astrophysics, MS-18, 60 Garden Street, Cambridge, MA 02138, USA;Observatoire de la Côte d'Azur, BP 4229, 06304 Nice cedex 04, France;National Research Council Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria, BC V9E 2E7, Canada |