¹ Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218
² Visiting Astronomer at the NASA Infrared Telescope Facility, which is operated by the University of Hawaii under contract from the National Aeronautics and Space Administration
³ Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802
⁴ Princeton University Observatory, Princeton, NJ 08544
⁵ Department of Physics, University of California at Davis, Davis, CA 95616
⁶ Department of Astronomy, University of California at Berkeley, Berkeley, CA 94720-3411
⁷ Space Telescope Science Institute, Baltimore, Maryland 21218
⁸ Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510
⁹ Department of Physics and Astronomy, University of Pittsburg, Pittsburgh PA 15260
¹⁰ Department of Physics of Complex Systems, Eötvös University, Pázmány Péter sétány 1/A, Budapest, H-1117, Hungary
¹¹ Institute for Cosmic-Ray Research, University of Tokyo, Midori, Tanashi, Tokyo 188-8502, Japan
¹² Institute for Advanced Study, Olden Lane, Princeton, NJ 08540
¹³ U.S. Naval Observatory, 3450 Massachusetts Avenue, NW, Washington, DC 20392-5420
¹⁴ Astronomy and Astrophysics Center, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637