1. Institute for Computational Cosmology, Durham University, South Road, Durham, DH1 3LE, UK
2. Centre for Extragalactic Astronomy, Durham University, South Road, Durham, DH1 3LE, UK
3. Dipartimento di Fisica G. Occhialini, Università degli Studi di Milano Bicocca, Piazza della Scienza 3, I-20126 Milano, Italy
4. W. M. Keck Observatory 65-1120 Mamalahoa Hwy, Kamuela, HI 96743, USA
5. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
6. DARK, Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, DK-2100 Copenhagen, Denmark
7. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
8. Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 27, CH-8093 Zurich, Switzerland
9. Dipartimento di Fisica e Astronomia, Università degli Studi di Firenze, Via Giovanni Sansone, I-50019 Sesto Fiorentino, Italy
10. Centre for Advanced Instrumentation, Durham University, South Road, Durham, DH1 3LE, UK