¹ Department of Astronomy and Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802
² Princeton University Observatory, Peyton Hall, Princeton, NJ 08544-1001
³ The Institute for Advanced Study, Olden Lane, Princeton, NJ 08540-0631
⁴ McDonald Observatory, Department of Astronomy, University of Texas at Austin, Austin, TX 78712
⁵ Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510
⁶ Department of Astronomy and Astrophysics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637
⁷ Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195
⁸ Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349-0059
⁹ Department of Astronomy, 105-24, California Institute of Technology, 1201 East California Boulevard, Pasadena, CA 91125
¹⁰ Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218-2686
¹¹ Department of Physics of Complex Systems, Eötvös University, Pázmáy Péter sétány 1/A, H-1117, Budapest, Hungary
¹² Institute for Cosmic Ray Research, University of Tokyo, 3-2-1 Midori, Tanashi, Tokyo 188-8502, Japan
¹³ US Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420
¹⁴ US Naval Observatory, Flagstaff Station, P.O. Box 1149, Flagstaff, AZ 86002-1149