1. Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK
2. Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, I-20133 Milano, Italy
3. Physikalisches Institut, Universität Bern, Gesellschaftstrasse 6, CH-3012 Bern, Switzerland
4. Institute for Computational Science, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
5. Univ Lyon, Ens de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon, Observatoire de Lyon, 9 av Charles Andre, F-69230 Saint-Genis-Laval, France
6. Monash Centre for Astrophysics (MoCA) and School of Physics and Astronomy, 3168, Monash University, Australia