1. School of Mathematics and Physics, University of Queensland , QLD 4072 , Australia
2. Centre for Astrophysics & Supercomputing, Swinburne University of Technology , P.O. Box 218, Hawthorn, VIC 3122 , Australia
3. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USA
4. Department of Physics, The University of Texas at Dallas , 800 W. Campbell Rd, Richardson, TX 75080 , USA
5. Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 , USA
6. Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT , UK
7. Department of Physics and Astronomy, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1 , Canada
8. Perimeter Institute for Theoretical Physics , 31 Caroline St. North, Waterloo, ON N2L 2Y5 , Canada
9. Waterloo Centre for Astrophysics, University of Waterloo , 200 University Ave W, Waterloo, ON N2L 3G1 , Canada
10. Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Menlo Park, CA 94305 , USA
11. Physics Department, Stanford University , Stanford, CA 93405 , USA
12. Department of Astronomy and Astrophysics, University of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 95065 , USA
13. Center for Cosmology and Astro-Particle Physics, The Ohio State University , Columbus, OH 43210 , USA
14. Department of Physics, The Ohio State University , Columbus, OH 43210 , USA
15. Department of Physics and Astronomy, Sejong University , Seoul 143-747 , Korea
16. Korea Astronomy and Space Science Institute , 776, Daedeokdae-ro, Yuseong-gu, Daejeon 34055 , Republic of Korea
17. Department of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275 , USA
18. Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510 , México
19. Department of Physics and Astronomy, University of Rochester , 500 Joseph C. Wilson Boulevard, Rochester, NY 14627 , USA
20. Institució Catalana de Recerca i Estudis Avançats , Passeig de Lluís Companys, 23, E-08010 Barcelona , Spain
21. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra Barcelona , Spain
22. Space Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720 , USA
23. University of California , Berkeley, 110 Sproul Hall #5800 Berkeley, CA 94720 , USA
24. Instituto de Astrofisica de Andalucía, Glorieta de la Astronomía , s/n, E-18008 Granada , Spain
25. University of Michigan , Ann Arbor, MI 48109 , USA