Affiliation: | Edmond Giraud1,Qiu-Sheng Gu2,Jorge Melnick3,Hernan Quintana4,Fernando Selman3,Ignacio Toledo4 and Paula Zelaya4 1 LPTA,Université Montpellier 2-CNRS/IN2P3,34095 Montpellier,France,2 Department of Astronomy,Nanjing University,Nanjing 210093,China,3 European Southern Observatory,Alonso de Córdova 3107,Santiago,Chile 4 Department of Astronomy and Astrophysics,P.Universidad Catolica de Chile,Casilla 306,Chile |