1. Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia
2. Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark
3. Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
4. Institute for Astronomy, University of Hawai'i, 2680 Woodlawn Drive, Honolulu, HI 96822, USA
5. SETI Institute, 189 Bernardo Avenue, Mountain View, CA 94043, USA
6. Institut für Astrophysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany
7. Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg 3, D-37077 Göttingen, Germany
8. School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
9. School of Physics, University of New South Wales, Sydney, NSW 2052, Australia