1. Department of Physics and Astronomy, University College London, London WC1E 6BT, UK
2. Institute of Astronomy, University of Cambridge, Cambridge CB3 0HA, UK
3. School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA
4. Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA
5. Physics and Astronomy Department, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
6. Steward Observatory, University of Arizona, Tucson, AZ 85721, USA
7. Smithsonian Astrophysical Observatory, Cambridge, MA 02138, USA
8. Isaac Newton Group of Telescopes, E-38700 Santa Cruz de La Palma, Spain
9. Department of Physics, University of Warwick, Coventry CV4 7AL, UK
10. Centre for Exoplanets and Habitability, University of Warwick, Coventry CV4 7AL, UK
11. Physical Sciences Department, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114, USA
12. Space Telescope Science Institute, Baltimore, MD 21218, USA
13. Gemini Observatory, Northern Operations, Hilo, HI 96720, USA
14. SOFIA-USRA, NASA Ames Research Center, Moffett Field, CA 94035, USA