1. Department of Physics, Duke University Durham , NC 27708 , USA
2. Physics Department, UC Santa Cruz , 1156 High Street, Santa Cruz, CA 95064 , United States
3. Department of Physics, Northeastern University , Boston, MA 02115 , USA
4. Institute of Cosmology and Gravitation, University of Portsmouth , Portsmouth, PO1 3FX , UK
5. Argonne National Laboratory , 9700 South Cass Avenue, Lemont, IL 60439 , USA
6. Department of Astronomy and Astrophysics, University of Chicago , Chicago, IL 60637 , USA
7. Kavli Institute for Cosmological Physics, University of Chicago , Chicago, IL 60637 , USA
8. Astronomy Unit, Department of Physics, University of Trieste , via Tiepolo 11, I-34131 Trieste , Italy
9. INAF-Osservatorio Astronomico di Trieste , via G. B. Tiepolo 11, I-34143 Trieste , Italy
10. Institute for Fundamental Physics of the Universe , Via Beirut 2, I-34014 Trieste , Italy
11. Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720 , USA
12. University Observatory, Faculty of Physics, Ludwig-Maximilians-Universität , Scheinerstr. 1, D-81679 Munich , Germany
13. Fermi National Accelerator Laboratory , P. O. Box 500, Batavia, IL 60510 , USA
14. Center for Astrophysical Surveys, National Center for Supercomputing Applications , 1205 West Clark St., Urbana, IL 61801 , USA
15. Department of Astronomy, University of Illinois at Urbana-Champaign , 1002 W. Green Street, Urbana, IL 61801 , USA
16. Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, PA 19104 , USA
17. Department of Applied Mathematics and Theoretical Physics, University of Cambridge , Cambridge CB3 0WA , UK
18. Department of Physics, University of Arizona , Tucson, AZ 85721 , USA
19. Department of Astrophysical Sciences, Princeton University , Peyton Hall, Princeton, NJ 08544 , USA
20. Institut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona , Spain
21. Institute of Space Sciences (ICE, CSIC) , Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona , Spain
22. Kavli Institute for Particle Astrophysics & Cosmology , P. O. Box 2450, Stanford University, Stanford, CA 94305 , USA
23. SLAC National Accelerator Laboratory , Menlo Park, CA 94025 , USA
24. Brookhaven National Laboratory , Bldg 510, Upton, NY 11973 , USA
25. Department of Physics and Astronomy, Stony Brook University , Stony Brook, NY 11794 , USA
26. Instituto de Astrofisica de Canarias , E-38205 La Laguna, Tenerife , Spain
27. Laboratório Interinstitucional de e-Astronomia - LIneA , Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400 , Brazil
28. Universidad de La Laguna , Dpto. AstrofÃsica, E-38206 La Laguna, Tenerife , Spain
29. Centro de Investigaciones Energéticas , Medioambientales y Tecnológicas (CIEMAT), Madrid 28040 , Spain
30. Institute for Astronomy , University of Edinburgh, Edinburgh EH9 3HJ , UK
31. Excellence Cluster Origins , Boltzmannstr. 2, D-85748 Garching , Germany
32. Max Planck Institute for Extraterrestrial Physics , Giessenbachstrasse, D-85748 Garching , Germany
33. Universitäts-Sternwarte, Fakultät für Physik, Ludwig-Maximilians Universität München , Scheinerstr. 1, D-81679 München , Germany
34. Department of Astronomy, University of Michigan , Ann Arbor, MI 48109 , USA
35. Department of Physics, University of Michigan , Ann Arbor, MI 48109 , USA
36. Institute of Astronomy, University of Cambridge , Madingley Road, Cambridge CB3 0HA , UK
37. Kavli Institute for Cosmology, University of Cambridge , Madingley Road, Cambridge CB3 0HA , UK
38. CNRS , UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris , France
39. Sorbonne Universités , UPMC Univ Paris 06, UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris , France
40. Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT , UK
41. School of Mathematics and Physics, University of Queensland , Brisbane, QLD 4072 , Australia
42. Department of Physics , IIT Hyderabad, Kandi, Telangana 502285 , India
43. Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Dr, Pasadena, CA 91109 , USA
44. Institute of Theoretical Astrophysics, University of Oslo. P.O. Box 1029 Blindern , NO-0315 Oslo , Norway
45. Santa Cruz Institute for Particle Physics , Santa Cruz, CA 95064 , USA
46. Center for Cosmology and Astro-Particle Physics, The Ohio State University , Columbus, OH 43210 , USA
47. Department of Physics, The Ohio State University , Columbus, OH 43210 , USA
48. Center for Astrophysics | Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138 , USA
49. Australian Astronomical Optics, Macquarie University , North Ryde, NSW 2113 , Australia
50. Lowell Observatory , 1400 Mars Hill Rd, Flagstaff, AZ 86001 , USA
51. Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo , CP 66318, São Paulo, SP, 05314-970 , Brazil
52. George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy , Texas A&M University, College Station, TX 77843 , USA
53. Institució Catalana de Recerca i Estudis Avançats , E-08010 Barcelona , Spain
54. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra (Barcelona) Spain
55. Department of Physics, Carnegie Mellon University , Pittsburgh, Pennsylvania 15312 , USA
56. Observatório Nacional , Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400 , Brazil
57. Department of Physics, University of Genova and INFN , Via Dodecaneso 33, I-16146 Genova , Italy
58. Department of Physics and Astronomy, Pevensey Building, University of Sussex , Brighton, BN1 9QH , UK
59. School of Physics and Astronomy, University of Southampton , Southampton, SO17 1BJ , UK
60. Computer Science and Mathematics Division , Oak Ridge National Laboratory, Oak Ridge, TN 37831
61. Waldorf High School , Belmont, MA 02478 , United States