The Supergalactic Plane Redshift Survey

Redshift measurements, ~1000 of which are new, are presented for 1314 galaxies in a survey toward the apex of the large-scale streaming flow for ellipticals. The velocity histogram shows that the excess in galaxy number counts in this area is due to a substantial concentration of galaxies with discrete peaks at V~3000 km s^-1^ and V~4500 km s^-1^. After correction for the sampling function, the centroid of the density distribution is found to be near V~4500 km s^-1^. Normalization to the more extensive SSRS survey, which was selected by the same criteria, shows that the region studied contains a considerable overdensity of galaxies from 2000 to 6000 km s^-1^. This result is in good agreement with the "great attractor" model suggested by Lynden-Bell et al. which attributes the peculiar motions of elliptical galaxies over a large region of space to an extensive mass overdensity which includes the Hydra-Centaurus and Pavo-Indus superclusters. The centroid of the density enhancement is also consistent with new data by Dressler and Faber of peculiar motions of elliptical and spiral galaxies, both of which show a zero crossing of the Hubble line at approximately 4500-5000 km s^-1^.