Percolation galaxy groups and clusters in the SDSS redshift survey: Identification, catalogs, and the multiplicity function

Andreas A. Berlind, Joshua Frieman, David H. Weinberg, Michael R. Blanton, Michael S. Warren, Kevork Abazajian, Ryan Scranton, David W. Hogg, Roman Scoccimarro, Neta A. Bahcall, J. Brinkmann, J. Richard Gott, S. J. Kleinman, J. Krzesinski, Brian C. Lee, Christopher J. Miller, Atsuko Nitta, Donald P. Schneider, Douglas L. Tucker, Idit Zehavi