Affiliation: | (1) Code 681, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA;(2) Princeton University Observatory, Princeton, NJ 08544, USA;(3) Institut d'Astrophysique de Paris, 98bis, Blvd. Arago, 75014 Paris, France;(4) Dept. of Astronomy, Whitman College, Walla Walla, WA 99362, USA |