We present two new catalogues of superclusters of galaxies out to a redshift of z = 0.15 , based on the Abell/ACO cluster redshift compilation maintained by one of us ( HA ) .
The first of these catalogues , the all-sky Main SuperCluster Catalogue ( MSCC ) , is based on only the rich ( A- ) Abell clusters , and the second one , the Southern SuperCluster Catalogue ( SSCC ) , covers declinations \delta < -17 ^ { \circ } and includes the supplementary Abell S-clusters .
A tunable Friends-of-Friends ( FoF ) algorithm was used to account for the cluster density decreasing with redshift and for different selection functions in distinct areas of the sky .
We present the full list of Abell clusters used , together with their redshifts and supercluster memberships and including the isolated clusters .
The SSCC contains about twice the number of superclusters than MSCC for \delta < -17 ^ { \circ } , which we found to be due to : ( 1 ) new superclusters formed by A-clusters in their cores and surrounded by S-clusters ( 50 % ) , ( 2 ) new superclusters formed by S-clusters only ( 40 % ) , ( 3 ) redistribution of member clusters by fragmentation of rich ( multiplicity m > 15 ) superclusters ( 8 % ) , and ( 4 ) new superclusters formed by the connection of A-clusters through bridges of S-clusters ( 2 % ) .
Power-law fits to the cumulative supercluster multiplicity function yield slopes of \alpha = -2.0 and \alpha = -1.9 for MSCC and SSCC respectively .
This power-law behavior is in agreement with the findings for other observational samples of superclusters , but not with that of catalogues based on cosmological simulations .