Institution: | a INAF - Osservatorio Astronomico di Torino, 10025 Pino Torinese (TO), Italy b Department of Astronomy, University of Padova, 35122 Padova, Italy c INAF - Osservatorio Astronomico di Arcetri, 50125 Firenze, Italy Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany d IMCCE, UMR CNRS 8028, Observatoire de Paris, 75014 Paris, France e INAF - Osservatorio Astronomico di Torino, 10025 Pino Torinese (TO), Italy Observatoire de la Cote d’Azur, Nice, France f INAF - Telescopio Nazionale Galileo, 38700 Santa Cruz de La Palma, Tenerife. P.O. Box 565, Spain |