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We present two new catalogues of superclusters of galaxies out to a redshitof z = 0.15, based on the Abell/ACO cluster redshift compilation maintained byone of us (HA). The first of these catalogues, the all-sky Main SuperClusterCatalogue (MSCC), is based on only the rich (A-) Abell clusters, and the secondone, the Southern SuperCluster Catalogue (SSCC), covers declinations delta <-17 deg and includes the supplementary Abell S-clusters. A tunableFriends-of-Friends (FoF) algorithm was used to account for the cluster densitydecreasing with redshift and for different selection functions in distinctareas of the sky. We present the full list of Abell clusters used, togetherwith their redshifts and supercluster memberships and including the isolatedclusters. The SSCC contains about twice the number of superclusters than MSCCfor delta < -17 deg, which we found to be due to: (1) new superclusters formedby A-clusters in their cores and surrounded by S-clusters (50%), (2) newsuperclusters formed by S-clusters only (40%), (3) redistribution of memberclusters by fragmentation of rich (multiplicity m > 15) superclusters (8%), and(4) new superclusters formed by the connection of A-clusters through bridges ofS-clusters (2%). Power-law fits to the cumulative supercluster multiplicityfunction yield slopes of alpha = -2.0 and alpha = -1.9 for MSCC and SSCCrespectively. This power-law behavior is in agreement with the findings forother observational samples of superclusters, but not with that of cataloguesbased on cosmological simulations.

Two New Catalogues of Superclusters of Abell/ACO Galaxy Clusters out to redshift 0.15