Affiliation: | Astrophysikalisches Institut Potsdam, an der Sternwarte 16, 14482 Potsdam, Germany;Institut d'Astrophysique de Paris, 98bis Boulevard Arago, 75014 Paris, France;Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str.1, 85740 Garching, Germany;Ohio State University, Department of Astronomy, Columbus, OH 43210, USA;Astronomy Department, University of Massachusetts at Amherst, MA 01003, USA;University of Arizona, Steward Observatory, Tucson, AZ 85721, USA;Centre de Recherche Astronomique de Lyon, 9 Avenue Charles André, 69561, St-Genis-Laval Cedex, France |