The lumpy cluster Abell 1185

Abell 1185, a richness class 1 cluster of galaxies (<c(z)over bar> = 9800 km s(-1)), has kinematic and x-ray substructure. We measure 39 new velocities in its field, bringing the known cluster population to 82 galaxies within 1.4h(-1) Mpc of the cluster center. The sample has a depth of m(R) similar or equal to 15.8, and no substantial spatial bias. In addition to the optical data we reanalyze a deep (11 459 s) Einstein x-ray observation. Clumps in the velocity distribution of A1185 are localized on the sky. The Dressler-Shectman test confirms the existence of subclumps with >99% confidence. X-ray emission from the cluster also appears complex; contributions from individual galaxies within A1185 are detectable. The brightest unresolved x-ray source coincides with an elliptical galaxy which contains an active LINER nucleus. Throughout the paper we define H-0 = 100h km s(-1) Mpc(-1), and unless otherwise indicated, we assume h = 1. (C) 1996 American Astronomical Society.