We thank G. Scharmer for the opportunity to observe at the SVST, G. Hosinsky, R. Kever, G. W. Simon, and W. Wang for observational support, as well as W. Mühlman and R. Shine for help in the pre-reduction of the data. M. Shand of DEC (Paris) supplied financial and technical assistance with the data acquisition system. The SVST is operated on the island of La Palma by the Royal Swedish Academy of Sciences in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias.
© European Southern Observatory (ESO) 2000
Online publication: December 8, 1999