carey.lisse@jhuapl.edu cchen@stsci.edu wyatt@ast.cam.ac.uk A.Morlok@open.ac.uk song@uga.edu Geoffrey.Bryden@jpl.nasa.gov psheeha2@mail.rochester.edu

¹ JHU-APL, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
² STScI, 3700 San Martin Drive, Baltimore, MD 21218, USA
³ Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
⁴ The Open University, Milton Keynes, MK7 6AA, UK
⁵ Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602, USA
⁶ Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA
⁷ Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA
⁸ Address for correspondence: Planetary Exploration Group, Space Department, Johns Hopkins University, Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA.
⁹ Current address: CRPG-CNRS, UPR2300, 15 rue Notre Dame des Pauvres, BP20, 54501 Vandoeuvre les Nancy, France.