Complete High Precision Study of Galaxy Clusters for Modern Cosmology

We request 109virgulks data for 4 clusters to complete a volumelimited sample of 51clusters at 0.15<z<0.3. Our investigation of the existing data hints massdependence of the systematic biases in the Xray to weak lensing mass ratios.The Xray mass proxies, e.g., Yx, show low scatter against mass, but thebestfit scaling relations are likely biased by the noted massdependence. Themain limitation of our program is that we have not yet observed the full sample,and thus application of our results to future surveys will be undermined byinadvertent selection biases. We propose to complete this joint Xray, lensing,dynamics, and SZ effect study, testing for mass/radial dependence of the massbias. We will deliver definitive constraints on systematics for upcoming cluster cosmology surveys. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]