We thank the SV team for the observation of this pulsar and making available the summed image for analysis, and Claes-Ingvar Björnsson for discussions. P.L. and J.S. are supported by the Swedish National Space Board, and P.L. is also supported by the Swedish Natural Science Research Council. The work of A.R. is part of the 9th Five Year Plan project 9P-208[a] at Tata Institute.
© European Southern Observatory (ESO) 1999
Online publication: March 1, 1999