We thank the referee, H. van Woerden, for his critical analysis concerning possible problems with the data reduction. This initiated a complete reanalysis of the LDS observations. We are grateful to J. Lockman, J. Kerp, J. Pietz, K.S. de Boer and W. Hirth for helpful discussions.
© European Southern Observatory (ESO) 1998
Online publication: March 30, 1998