XMM-Subaru:Complete High Precision Study of Galaxy Clusters for Modern Cosmology

We request 382 ks data for 12 clusters to complete our survey of avolumelimited sample of 55 clusters. We investigated the existing data, whichhints a mass dependent bias in the Xray to weak lensing mass ratios fordisturbed ones. Xray mass proxies, e.g., Yx, show low scatter, but the bestfits, particularly the slopes, of the massobservable relations may be biaseddue to this mass dependence. Our program will quantify any mass/radial dependentbias based on three independent probes (Xray/lensing/velocity dispersion) forsuch a volumelimited sample, and deliver definitive constraints on systematicsfor upcoming cluster cosmology surveys. The dataset will be a major asset forprograms aiming to measure dark energy and programs adding a multiwavelength focus to studies of cluster physics. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]