We use Sloan Digital Sky Survey (SDSS) data to investigate galaxy cluster properties of the systems first detected within Digitized Second Palomar Observatory Sky Survey. With the high-quality photometry of SDSS, we derived new photometric redshifts and estimated richness and optical luminosity. For a subset of low-redshift (z<=0.1) clusters, we have used SDSS spectroscopic data to identify groups in redshift space in the region of each cluster, complemented with massive systems from the literature to assure the continuous mass sampling. A method to remove interlopers is applied, and a virial analysis is performed resulting in the estimates of velocity dispersion, mass and a physical radius for each low-z system.

Cone search capability for table J/MNRAS/392/135/clusters (Main properties, velocity dispersions, radii, masses, and X-ray properties of NoSOCS (127) and CIRS (56) clusters at z<=0.01 and with at least 10 member galaxies (tables 1--5 of paper))