1. Dipartimento di Fisica G. Occhialini, Università degli Studi di Milano Bicocca, Piazza della Scienza 3, I-20126 Milano, Italy
2. INAF – Osservatorio Astronomico di Brera, via Bianchi 46, I-23087 Merate (LC), Italy
3. INAF – Osservatorio Astronomico di Trieste, via G. B. Tiepolo 11, I-34143 Trieste, Italy
4. Centre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham DH1 3LE, UK
5. Data Insights and Statistics Division, Department for Education, Bishopsgate House, Feethams, Darlington DL1 5QE, UK
6. Department of Physics, Lancaster University, Lancaster LA1 4YB, UK
7. Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 27, CH-8093 Zurich, Switzerland
8. Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ, UK
9. Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF, UK
10. Department of Astronomy, University of Massachusetts–Amherst, 710 North Pleasant Street, Amherst, MA 01003-9305, USA
11. Department of Astronomy & Astrophysics, UCO/Lick Observatory, University of California, 1156 High Street, Santa Cruz, CA 95064, USA
12. Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str 1, D-85748 Garching bei München, Germany
13. Department of Astronomy, New Mexico State University, Las Cruces, NM 88003, USA
14. Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, DK-2100 Copenhagen, Denmark
15. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
16. Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, the Netherlands
17. Instituto de Física, Pontificia Universidad Católica de Valparaíso, Casilla 4059, Valparaíso, Chile
18. Institute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE, UK