1. Dipartimento di Fisica e Astronomia, Università di Padova, Vicolo dell’Osservatorio 2, I-35122 Padova, Italy
2. Osservatorio Astronomico di Padova – INAF, Vicolo dell’Osservatorio 5, I-35122 Padova, Italy
3. Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
4. CRAR, M468, University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia
5. SISSA, via Bonomea 265, I-34136 Trieste, Italy
6. INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, via Piero Gobetti 93/3, I-40129, Bologna, Italy
7. Department of Physics and Astronomy, Macquarie University, Balaclava Road, North Ryde, NSW 2109, Australia
8. Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Lu 5, Hai Dian District, Beijing 100871, China
9. International Space Science Institute–Beijing, 1 Nanertiao, Zhongguancun, Hai Dian District, Beijing 100190, China
10. Astronomy Unit, School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London E1 4NS, UK
11. Koninklijke Sterrenwacht van België, Ringlaan 3, B-1180 Brussels, Belgium
12. European Southern Observatory, Ave. Alonso de Cordova 3107, Vitacura, Santiago, Chile
13. European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei München, Germany
14. Lennard-Jones Laboratories, Keele University, ST5 5BG, UK
15. INAF – Osservatorio Astronomico di Capodimonte, via Moiariello 16, I-80131, Naples, Italy
16. Department of Astronomy, Peking University, Yi He Yuan Lu 5, Hai Dian District, Beijing 100871, China