¹ Princeton University Observatory, Princeton, NJ 08544
² Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218
³ Department of Astronomy, University of California, Berkeley, CA 94720-3411
⁴ Department of Physics, University of California, Davis, CA 95616
⁵ IGPP/Lawrence Livermore National Laboratory, Livermore, CA 95616
⁶ Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802
⁷ Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510
⁸ Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195
⁹ Department of Astronomy, California Institute of Technology, Pasadena, CA 91125
¹⁰ Department of Physics and Astronomy, Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218
¹¹ Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260
¹² Department of Astronomy and Research Center for the Early Universe, School of Science, University of Tokyo, Hongo, Bunkyo, Tokyo, 113-0033, Japan
¹³ Institute for Cosmic Ray Research, University of Tokyo, Midori, Tanashi, Tokyo 188-8502, Japan
¹⁴ Institute for Advanced Study, Olden Lane, Princeton, NJ 08540
¹⁵ US Naval Observatory, 3450 Massachusetts Avenue Northwest, Washington, DC 20392-5420
¹⁶ Remote Sensing Division, Code 7215, Naval Research Laboratory, 4555 Overlook Avenue Southwest, Washington, DC 20375
¹⁷ Astronomical Institute, Tohoku University, Aoba, Sendai 980-8578 Japan
¹⁸ Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QJ, UK
¹⁹ Institute for Astronomy, University of Edinburgh, Edinburgh EH9 3HJ, UK
²⁰ Department of Physics, University of Michigan, 500 East University, Ann Arbor, MI 48109
²¹ US Naval Observatory, Flagstaff Station, P.O. Box 1149, Flagstaff, AZ 86002-1149
²² Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180
²³ Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213
²⁴ Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
²⁵ Department of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104
²⁶ Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637