1. Universitäts-Sternwarte München, Scheinerstr. 1, D-81679 München, Germany
2. Centre for Star and Planet Formation, the Niels Bohr Institute and the Natural History Museum of Denmark, University of Copenhagen, Østervoldgade 5-7, DK-1350 Copenhagen K, Denmark
3. Excellence Cluster Origin and Structure of the Universe, Boltzmannstr. 2, D-85748 Garching bei München, Germany
4. INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy
5. Department of Astronomy, University of Virginia, Charlottesville, VA-22904, USA
6. Data Management and Software Centre, the European Spallation Source ERIC, Ole Maaløes Vej 3, DK-2200 Copenhagen, Denmark