1. AlbaNova University Centre, Stockholm University, Department of Astronomy, Stockholm, Sweden.
2. Stockholm University Astrobiology Centre, Stockholm, Sweden.
3. LESIA-Observatoire de Paris, UPMC Univ. Paris 06, Univ. Paris-Diderot, Paris, France.
4. Southwest Research Institute, Boulder, Colorado, USA.
5. Royal Institute of Technology (KTH), Science for Life Laboratory, Solna, Sweden.
6. Stockholm University, Department of Geological Sciences, Stockholm, Sweden.
7. Scientific Support Office, Directorate of Science, European Space Research and Technology Centre (ESA/ESTEC), Noordwijk, The Netherlands.