1. Leiden Observatory, Leiden University, Niels Bohrweg 2, 2333CA Leiden, The Netherlands
2. Laboratorio de Astroquímica e Astrobiologia, Universidade do Vale do Paraíba, Urbanova, 12244-000 SP, São José dos Campos, Brazil
3. Department of Physics and Astronomy, The University of Western Ontario, London, ON N6A 3K7, Canada
4. Centre for Planetary Science and Exploration (CPSX), The University of Western Ontario, London, ON N6A 3K7, Canada
5. Physics Department, St. Francis Xavier University, 5005 Chapel Square, Antigonish, NS B2G 2W5, Canada
6. Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada
7. SETI Institute, 189 Bernardo Avenue, Suite 100, Mountain View, CA 94043, USA