Abstract
Using the method of counts in cells we calculated the second and third moments in the angular distribution of northern Abell clusters with richness classes ⩾ 1 and hence their spatial three-point correlation. We also calculated the three-point correlation function for a redshift sample of D⩽4, R⩾1 Abell clusters, the results are in agreement with those obtained for samples with estimated redshifts, thus showing further that the three-point correlation function of galaxies and Abell clusters can be described by a universal form.
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