1. Centre for Astrophysics Research, School of Physics, Astronomy and Mathematics, University of Hertfordshire, College Lane, Hatfield AL10 9AB, UK
2. Faculty of Science, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
3. Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir km 4, E-28850 Torrejón de Ardoz, Madrid, Spain
4. Dpto. Astrofísica, Facultad de CC. Físicas, Universidad Complutense de Madrid, E-28040 Madrid, Spain
5. Landessternwarte, Zentrum für Astronomie der Universität Heidelberg, Königstuhl 12, D-69117 Heidelberg, Germany
6. Warsaw University Astronomical Observatory, Al. Ujazdowskie 4, PL-00-478 Warszawa, Poland
7. Instituto de Física y Astronomía, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Casilla 5030, Valparaíso, Chile
8. Millennium Institute of Astrophysics, Santiago, Chile
9. Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Torino, Strada Osservatorio 20, I-10025 Pino Torinese, Italy
10. Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain
11. Department Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
12. GTC Project Office, E-38205 La Laguna, Tenerife, Spain
13. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China