1. School of Mathematics, Statistics and Physics, Newcastle University , NE1 7RU , UK
2. Centre for Extragalactic Astronomy, Department of Physics, Durham University , South Road, Durham, DH1 3LE , UK
3. Department of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112 , USA
4. Department of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071 , USA
5. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USA
6. Physics Dept., Boston University , 590 Commonwealth Avenue, Boston, MA 02215 , USA
7. Institute of Cosmology & Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX , UK
8. Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT , UK
9. Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510 , México
10. The Ohio State University , Columbus, 43210 OH , USA
11. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, 08193 Bellaterra Barcelona , Spain
12. Departamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá , Colombia
13. Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210 , USA
14. Department of Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210 , USA
15. NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 , USA
16. Department of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275 , USA
17. Institució Catalana de Recerca i Estudis Avançats , Passeig de Lluís Companys, 23, 08010 Barcelona , Spain
18. Department of Physics and Astronomy , Siena College, 515 Loudon Road, Loudonville, NY 12211 , USA
19. National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Rd., Chaoyang District, Beijing, 100012 , P.R. China
20. Department of Physics and Astronomy, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1 , Canada
21. Perimeter Institute for Theoretical Physics , 31 Caroline St. North, Waterloo ON N2L 2Y5 , Canada
22. Waterloo Centre for Astrophysics, University of Waterloo , 200 University Ave W, Waterloo ON N2L 3G1 , Canada
23. Space Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720 , USA
24. University of California , Berkeley, 110 Sproul Hall #5800 Berkeley, CA 94720 , USA
25. Steward Observatory, University of Arizona , 933 N, Cherry Ave, Tucson, AZ 85721 , USA
26. Department of Physics and Astronomy, Sejong University , Seoul, 143-747 , Korea
27. Institute of Space Sciences , ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, 08913 Bellaterra, Barcelona , Spain
28. University of Michigan , Ann Arbor, MI 48109 , USA