1. School of Physics and Astronomy, Monash University , Vic 3800, Australia
2. Space sciences, Technologies & Astrophysics Research (STAR) Institute, Université de Liège , Allée du Six Août 19c, B-4000 Sart Tilman, Belgium
3. Dipartimento di Fisica, Università Degli Studi di Milano , Via Celoria, 16, Milano, I-20133, Italy
4. Theoretical Division, Los Alamos National Laboratory , Los Alamos, NM 87545, USA
5. Univ. Grenoble Alpes , CNRS, IPAG, F-38000 Grenoble, France
6. Unidad Mixta Internacional Franco-Chilena de Astronomía (CNRS, UMI 3386), Departamento de Astronomía, Universidad de Chile , Camino El Observatorio 1515, Las Condes, Santiago, Chile
7. European Southern Observatory (ESO) , Karl-Schwarzschild-Str 2, D-85748 Garching, Germany
8. INAF, Osservatorio Astrofisico di Arcetri , Largo Enrico Fermi 5, I-50125 Firenze, Italy
9. INAF, Osservatorio Astrofisico di Torino , Via Osservatorio 20, I-10025 Pino Torinese, Italy