We are grateful to C.J. Grillmair, the referee, for his careful reading of the manuscript and his suggestions for improving the paper. The authors warmly thank Tad Pryor for making available it's code for the generation of multi-mass King-Michie models. We thanks I. Saviane for his help in constructing the surface density map of M 55. Finally, we warmly thanks Nicola Caon for doing the observations included in this work.
© European Southern Observatory (ESO) 1997
Online publication: April 6, 1998