CIZA: WEIGHING THE LARGEST MASS CONCENTRATIONS IN THE GREAT ATTRACTOR REGION

We propose the continuation of our XMM survey of galaxy clusters at z<0.075located within a 40x40 sq.deg. region around the approximate location of theGreat Attractor (GA) behind the Milky Way, to explain the observed largescaleflow toward and beyond the GA. All but one of our target clusters are newdiscoveries, found in the course of the CIZA Xray cluster survey. Our totalsample of 16 represents a complete census of the most Xray luminous and thuspresumably most massive clusters in this region. The proposed observations willallow us to measure accurate cluster masses, which in turn will permit areconstruction of the local gravitational field that is independent of andcomplementary to the one based on the density of IRASselected field galaxies. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]