ON THE UNIVERSALITY OF THE TYPE-DEPENDENT LUMINOSITY FUNCTIONS

We find that the bright part (M-B < -18.5 mag) of luminosity function of each Hubble type has the same shape in three poor clusters (Virgo, Fornax and Centaurus) and in two rich clusters (Coma and C10939+4713). The fact that these type-dependent luminosity functions are invariant in shape from poor to rich environments gives support to the hypothes is that they may be universal. We also present in tabular form improve d type-dependent luminosity functions, based on a much larger sample t han previous works.