[For yesterday:]
Mike Gladders (OCIW) gave a very nice talk on the use of optically selected clusters in cosmology, showing that the results of surveys like RCS-2 and its successors will be great for cosmological tests. From my point of view his most interesting result is that though the bivariate distribution of mass and redshift for clusters is consistent with standard-model cosmology, the same distribution for clusters selected to have strong-lensing arcs is totally wrong. There are issues in interpretation, but the effect is so strong, it suggests that the solution will be important and interesting.
I also worked on some pretty pictures.
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