michel@astro.columbia.edu ds@astro.columbia.edu

¹ Department of Astronomy, Columbia University, MC2457, 550 West 120th Street, New York, NY 10027
² Department of Physics and Astronomy, University of California, Los Angeles, CA 90095
³ Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218
⁴ California Institute of Technology, MC 105-24, 1200 East California Boulevard, Pasadena, CA 91125
⁵ Astronomical Institute, Graduate School of Science, Tohoku University, Aramaki, Aoba, Sendai 980-8578, Japan
⁶ Institut d'Astrophysique de Paris, UMR 7095, 98 bis Boulevard Arago, 75014 Paris, France
⁷ Institute for Astronomy, 2680 Woodlawn Drive, University of Hawaii, Honolulu, HI 96822
⁸ Laboratoire d'Astrophysique de Marseille, BP 8, Traverse du Siphon, 13376 Marseille Cedex 12, France
⁹ Caltech Optical Observatories, MS 320-47, California Institute of Technology, Pasadena, CA 91125
¹⁰ Visiting Astronomer, University Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822
¹¹ Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771
¹² Center for Astrophysical Sciences, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218
¹³ Department of Physics and Astronomy, The Johns Hopkins University, Homewood Campus, Baltimore, MD 21218
¹⁴ Center for Space Astrophysics, Yonsei University, Seoul 120-749, Korea
¹⁵ Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101
¹⁶ Space Sciences Laboratory, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720