[1] Univ Grenoble Alpes, IPAG, F-38000 Grenoble, France
[2] CNRS, IPAG, F-38000 Grenoble, France
[3] Inst Astron, Cambridge CB3 OHA, England
[4] Univ Paris 07, Univ Paris 06, CNRS, LESIA,Observ Paris, F-92195 Meudon, France
[5] Univ Chile, Dept Astron, Santiago, Chile
[6] ESO, Santiago, Chile
[7] ETH, Inst Astron, CH-8093 Zurich, Switzerland
[8] Sterrenkundig Inst Anton Pannekoek, NL-1098 XH Amsterdam, Netherlands
[9] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands
[10] Max Planck Inst Astron, D-69117 Heidelberg, Germany
[11] Heidelberg Univ, Inst Theoret Astrophys, D-69120 Heidelberg, Germany
[12] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[13] Eureka Sci, Greenbelt, MD 20771 USA
[14] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[15] Ctr Astrobiol INTA CSIC, Villanueva De La Canada 28691, Spain
[16] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA
[17] Univ Lyon 1, CNRS, Ecole Normale Super Lyon, Observ Lyon,Ctr Rech Astrophys Lyon,UMR 5574, F-69230 St Genis Laval, France
[18] Univ Chile, CNRS INSU, UMI FCA, France UMI 3386, Santiago, Chile
[19] Univ Chile, Dept Astron, Santiago, Chile
[20] Univ Paris Diderot, CNRS, CEA DSM, Lab AIM,IRFU SAp, F-91191 Gif Sur Yvette, France
[21] Space Telescope Sci Inst, Baltimore, MD 21218 USA