[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA
[2] Barcelona Inst Sci & Technol, IFAE, Campus UAB, E-08193 Barcelona, Spain
[3] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA
[4] IEEC CSIC, Inst Ciencies Espai, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Spain
[5] Univ Manchester, Sch Phys & Astron, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, Lancs, England
[6] ETH, Dept Phys, Wolfgang Pauli Str 16, CH-8093 Zurich, Switzerland
[7] Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA
[8] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, POB 2450, Stanford, CA 94305 USA
[9] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA
[10] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
[11] Univ Chicago, Dept Phys, 5640 South Ellis Ave, Chicago, IL 60637 USA
[12] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
[13] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England
[14] Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England
[15] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA
[16] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
[17] Inst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, Spain
[18] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA
[19] Brookhaven Natl Lab, Bldg 510, Upton, NY 11973 USA
[20] Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile
[21] Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Grahamstown, South Africa
[22] CNRS, Inst Astrophys Paris, UMR 7095, F-75014 Paris, France
[23] UPMC Univ Paris 06, Sorbonne Univ, UMR 7095, Inst Astrophys Paris, F-75014 Paris, France
[24] Lab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
[25] Observ Nacl, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
[26] Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA
[27] Natl Ctr Supercomp Applicat, 1205 West Clark St, Urbana, IL 61801 USA
[28] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England
[29] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
[30] Excellence Cluster Universe, Boltzmannstr 2, D-85748 Garching, Germany
[31] Ludwig Maximilians Univ Munchen, Fac Phys, Scheinerstr 1, D-81679 Munich, Germany
[32] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
[33] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
[34] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[35] Australian Astron Observ, N Ryde, NSW 2113, Australia
[36] Univ Sao Paulo, Inst Fis, Dept Fis Matemat, CP 66318, BR-05314970 Sao Paulo, SP, Brazil
[37] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA
[38] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA
[39] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
[40] Princeton Univ, Dept Astrophys Sci, Peyton Hall, Princeton, NJ 08544 USA
[41] Max Planck Inst Extraterr Phys, Giessenbachstr, D-85748 Garching, Germany
[42] Univ Sussex, Dept Phys & Astron, Pevensey Bldg, Brighton BN1 9QH, E Sussex, England
[43] Ctr Invest Energet Medioambientales & Tecnol CIEM, Madrid, Spain
[44] Univ Estadual Paulista, ICTP South Amer Inst Fundamental Res, Inst Fis Teor, BR-01140070 Sao Paulo, Brazil
[45] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA
[46] Argonne Natl Lab, 9700 South Cass Ave, Lemont, IL 60439 USA