Institution: | (1) Institute of Astronomy, The University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo, 181, Japan;(2) Kiso Observatory, Institute of Astronomy, The University of Tokyo, Mitake-mura, Kiso-gun, Nagano, 397-01, Japan;(3) Department of Astronomy, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, 113, Japan;(4) South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa;(5) CEA/DSM/DAPNIA/Service d'Astrophys, C. E. Saclay, F-91191 Gif-sur-Yvette Cedex, France |