¹ Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
² University College London, Gower Street, London WC1E 6BT, UK
³ University of Arizona, Lunar and Planetary Laboratory, Space Science Building, Room 525, 1629 East, University Boulevard, Tucson, AZ 85721, USA
⁴ Max-Planck Institute for Astronomy, Konigstuhl 17, D-69117 Heidelberg, Germany
⁵ Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
⁶ Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA
⁷ Department of Physics & Astronomy, University of British Columbia, Vancouver, BC V6T 171, Canada
⁸ NASA Ames Research Center, MS 244-30, Moffett Field, CA 94035, USA
⁹ Institut fur Astronomie, Universitat Wien Turkenschanzstrasse 17, A-1180 Wien, Austria
¹⁰ Institute of Space Systems, University Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany
¹¹ DAAD-Fellow