J/A+A/310/31 J/A+A/310/31 The ESO Nearby Abell Cluster Survey. II. A Mazure P Katgert R den Hartog A Biviano P Dubath E Escalera P Focardi D Gerbal G Giuricin B Jones O Le Fevre M Moles J Perea G Rhee Astron. Astrophys. 310 31 1996 1996A&A...310...31M J/A+A/310/8 : ENACS. Part I. Clusters, galaxy Redshifts Velocity dispersion cosmology: observations dark matter galaxies: clusters: general galaxies: distances and redshifts The ESO Nearby Abell Cluster Survey (the ENACS) has yielded 5634 redshifts for galaxies in the directions of 107 rich, Southern clusters selected from the ACO catalogue (Abell et al. 1989). By combining these data with another 1000 redshifts from the literature, of galaxies in 37 clusters, we construct a volume-limited sample of 128 R_ACO_>=1 clusters in a solid angle of 2.55sr centered on the South Galactic Pole, out to a redshift z=0.1. For a subset of 80 of these clusters we can calculate a reliable velocity dispersion, based on at least 10 (but very often between 30 and 150) redshifts.

ACO Abell number of cluster --- n_ACO Code number=1 a = ESO Nearby Abell Cluster Survey (ENACS) data combined with literature b = literature data only (only in table 1a) c = system inside `cone' with z > 0.1 (only in table 1b) --- Ngal Number of galaxies in the system --- z Mean redshift of the system (if Nz=0, the z is photometric estimate) --- sigma Global velocity dispersion corrected for the effect of 'interlopers' km/s C(ACO) Background-corrected richness count, from ACO --- C(bck) Background correction applied by ACO to the apparent (raw) richness count --- C(3D) Inferred intrinsic (3D) richness, derived as C(3d)=f_main_*(C(ACO)+C(bck)), where f_main_ is the fraction of measured redshifts residing in the main system --- Patricia Bauer CDS 1996Mar01Peter Katgert <katgert@strw.LeidenUniv.nl> J_A+A_310_31.xml