Star counts were carried out on V CCD frames of the globular cluster M71. A systematic radial variation in the main-sequence luminosity function of the cluster is observed, clearly demonstrating that mass segregation is operative in the cluster. The mass segregation predicted by an isotropic multimass King model is shown to be in good agreement with the present observations. The observations are consistent with those expected from a cluster undergoing dynamical relaxation.
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Richer et al. (1989) studied this question.