Abell 3627 may be near its center, and data suggests it may be a supercluster.
A calibration used by Kates and Weigelt makes models containing this entity less favorable, while Lynden and Bell's work in analyzing velocity fields led them to suggest its existence.  The Shapley concentration is approximately 10 times its size, and it is located beyond Hydra-Centaurus. Evidence for its existence came from (*) CMB observations of the motion of the Local Group, as accounting for the Virgo Supercluster alone left residual components.  Abell 3627 may be near its center, and data suggests it may be a supercluster. For 10 points, identify this entity, which draws the Milky Way and other galaxies towards it.
A calibration used by Kates and Weigelt makes models containing this entity less favorable, while Lynden and Bell's work in analyzing velocity fields led them to suggest its existence.  
{Great Attractor}