[1] Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, Wales
[2] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
[3] Univ Copenhagen, Niels Bohr Inst, DARK, Lyngbyvej 2, DK-2100 Copenhagen O, Denmark
[4] Univ North Georgia, Dept Phys & Astron, Dahlonega, GA 30597 USA
[5] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England
[6] Univ Lyon 1, Inst Phys Deux Infinis, CNRS IN2P3, F-69622 Villeurbanne, France
[7] Univ Turku, Finnish Ctr Astron, ESO FINCA, FI-20014 Turku, Finland
[8] Univ Turku, Dept Phys & Astron, Tuorla Observ, FI-20014 Turku, Finland
[9] Univ Clermont Auvergne, LPC, CNRS IN2P3, F-63000 Clermont Ferrand, France
[10] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[11] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA
[12] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA
[13] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia
[14] Univ Granada, Dept Fis Teor & Cosmos, E-18071 Granada, Spain
[15] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
[16] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
[17] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA
[18] Natl Astron Observ Japan, Div Sci, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
[19] Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile
[20] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA
[21] Univ Autonoma Madrid, Inst Fis Teor UAM CSIC, E-28049 Madrid, Spain
[22] CNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France
[23] Sorbonne Univ, Inst Astrophys Paris, UPMC Univ Paris 06, UMR 7095, F-75014 Paris, France
[24] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
[25] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USA
[26] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
[27] Ctr Invest Energet Medioambientales & Tecnol CIEM, Madrid 28040, Spain
[28] Lab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
[29] Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA
[30] Natl Ctr Supercomp Applicat, 1205 West Clark St, Urbana, IL 61801 USA
[31] Barcelona Inst Sci & Technol, Inst Fis Altes Energies IFAE, Campus UAB, E-08193 Bellaterra, Barcelona, Spain
[32] Inst Estudis Espacials Catalunya IEEC, E-08034 Barcelona, Spain
[33] CSIC, Inst Space Sci ICE, Campus UAB S-N,Carrer Can Magrans S-N, E-08193 Barcelona, Spain
[34] Univ Wisconsin, Phys Dept, 2320 Chamberlin Hall,1150 Univ Ave, Madison, WI 53706 USA
[35] IIT Hyderabad, Dept Phys, Kandi 502285, Telangana, India
[36] Univ Arizona, Dept Astron, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA
[37] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
[38] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
[39] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
[40] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
[41] Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England
[42] Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA
[43] Observ Nacl, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
[44] Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
[45] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA
[46] ASTRAVEO LLC, POB 1668, Gloucester, MA 01931 USA
[47] Macquarie Univ, Australian Astron Opt, N Ryde, NSW 2113, Australia
[48] Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia
[49] Univ Sao Paulo, Inst Fis, Dept Fis Matemat, CP 66318, BR-05314970 Sao Paulo, SP, Brazil
[50] Inst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, Spain