dps@astro.psu.edu

¹ Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Laboratory, University Park, PA 16802
² Department of Physics and Astronomy, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
³ Princeton University Observatory, Princeton, NJ 08544
⁴ Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195
⁵ Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721
⁶ Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510
⁷ Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637
⁸ Adler Planetarium and Astronomy Museum, 1300 South Lake Shore Drive, Chicago, IL 60605
⁹ Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349-0059
¹⁰ Department of Physics, New York University, 4 Washington Place, New York, NY 10003
¹¹ Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801
¹² Department of Physics of Complex Systems, Eötvös Loránd University, Pf. 32, H-1518 Budapest, Hungary
¹³ Department of Astronomy and Research Center for the Early Universe, School of Science, University of Tokyo, Mitaka, Tokyo 181-0015, Japan
¹⁴ Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
¹⁵ Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540
¹⁶ Microsoft Research, 455 Market Street, Suite 1690, San Francisco, CA 94105
¹⁷ Department of Physics and Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218
¹⁸ Mount Suhora Observatory, Cracow Pedagogical University, ul. Podchorazych 2, 30-084 Krakow, Poland
¹⁹ Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QJ, UK
²⁰ Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218
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 Institute of Cosmology and Gravitation, University of Portsmouth, Mercantile House, Hampshire Terrace, Portsmouth PO1 2EG, UK
²⁴ UCO/Lick Observatory, University of California, Santa Cruz, CA 96064
²⁵ Lawrence Berkeley National Laboratory, Physics Division, 1 Cyclotron Road, Berkeley, CA 94720
²⁶ Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101
²⁷ Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse 1, D-85741 Garching, Germany
²⁸ Enrico Fermi Institute, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637