1. Department of Physics, Centre for Extragalactic Astronomy, Durham University , South Rd, Durham DH1 3LE , UK
2. Department of Physics, Institute for Computational Cosmology, Durham University , South Rd, Durham DH1 3LE , UK
3. National Astronomical Observatories, Chinese Academy of Sciences , 20A Datun Road, Chaoyang District, Beijing 100012 , China
4. School of Astronomy and Space Science, University of Chinese Academy of Sciences , Beijing 100049 , China
5. Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University , Beijing 102206 , China
6. Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109 , USA