| Affiliation: | Indian Institute of Astrophysics, Bangalore 560034, India; Department of Astronomy, University of Texas, Austin, TX 78712-1083, USA; McDonald Observatory, Fort Davis, TX 79734-1337, USA; Department of Astronomy, University of Washington, PO Box 351589, Seattle, WA 98195-1580, USA; Space Science Laboratories, University of California, Berkeley, CA 94720-7450, USA; Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106-7215, USA; Universitäts-Sternwarte, Georg-August Universität, Göttingen, 37083 Germany |
