1. Leiden Observatory, Leiden University, P. O. Box 9513, 2300 RA Leiden, The Netherlands
2. Max-Planck Institut für Extraterrestrische Physik (MPE), Giessenbachstr. 1, 85748, Garching, Germany
3. Université Paris-Saclay, CNRS, Institut d’Astrophysique Spatiale, 91405, Orsay, France
4. European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany
5. Kapteyn Astronomical Institute, Rijksuniversiteit Groningen, P. O. Box 800, 9700 AV Groningen, The Netherlands
6. Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium
7. Dublin Institute for Advanced Studies, Astronomy & Astrophysics Section, 31 Fitzwilliam Place, Dublin 2, Ireland
8. STAR Institute, Université de Liège, Allée du Six Août 19c, 4000 Liège, Belgium
9. UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ, UK
10. Max-Planck-Institut für Astronomie (MPIA), Königstuhl 17, 69117 Heidelberg, Germany