1. Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Spain
2. Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Spain
3. Departamento de Astrofísica y CC de la Atmósfera, Universidad Complutense de Madrid, E-28040 Madrid, Spain
4. Department of Physics, University of the Pacific, 3601 Pacific Avenue Stockton, CA 95211, USA
5. Department of astronomy, University of Geneva, 51 Ch. des Maillettes, CH-1290 Versoix, Switzerland
6. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
7. School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD, UK
8. Univ Lyon, Univ Lyon1, Ens de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon (CRAL) UMR5574, F-69230 Saint-Genis-Laval, France
9. Isaac Newton Group of Telescopes, Apartado 321, E-38700 Santa Cruz de La Palma, Spain
10. Laboratoire AIM-Paris-Saclay, CEA/DSM-CNRS-Université Paris Diderot, Irfu/Service d’Astrophysique, CEA Saclay, Orme des Merisiers, F-91191 Gif-sur-Yvette, France
11. Dipartimento di Fisica e Astronomia, Università di Padova, Vicolo dell’Osservatorio 3, I-35122 Padua, Italy