1. Institute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UK
2. Centre for Extragalactic Astronomy, Department of Physics, Durham University , South Road, Durham, DH1 3LE, UK
3. Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USA
4. National Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Chaoyang District, Beijing 100012, China
5. School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049, China
6. Dipartimento di Fisica e Astronomia ‘Augusto Righi’ - Alma Mater Studiorum Università di Bologna , via Piero Gobetti 93/2, I-40129 Bologna, Italy