We are very grateful to Valérie de Lapparent and H. Lin for making their counts in the R band available to us, and to A. Biviano for his adaptive kernel program. We acknowledge interesting discussions with G.B. Lima-Neto. CP would like to thank E. Thiébaut for many valuable discussions. Last but not least, we gratefully thank Dario Fadda for his help in tackling the problem of estimating error bars on the luminosity function and Frédéric Magnard for his help in these computations. We appreciated several interesting suggestions by the referee, A. Biviano. C.L. acknowledges financial support by the CNAA (Italia) fellowship reference D.D. n.37 08/10/1997, and C.P. acknowledges funding from the Swiss NF.
© European Southern Observatory (ESO) 1999
Online publication: March 1, 1999