Institution: | Dip. Fisica, Univ. 'Tor Vergata', Via Ricerca Scientifica 1, 00133 Roma, Italy;SISSA/ISAS, Via Beirut 2-4, 34014 Trieste, Italy;National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan;Institut d' Astrophysique de Paris, bd Arago 98bis, 75014 Paris, France;INFN –Sez. di Trieste, Via Valerio 2, 34100 Trieste, Italy;INAF –Ossevatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy;INAOE, Luis Enrique Erro 1, 72840 Tonantzintla, Puebla, Mexico |