(Proposal ID) S12A-063

(PI) Umetsu, Keiichi

(Proposal Title)
A Unique Cluster Mass Profile Dataset from an HST-Subaru Survey Program II

(Abstract)
We propose to continue our previous program (S10B-059) and complete deep 
BR_cz' imaging with Suprime-Cam for 7 out of 25 massive clusters of galaxies, 
part of the Cluster Lensing And Supernova survey with Hubble (CLASH), which 
has been awarded 524 orbits of Hubble Space Telescope (HST) time. CLASH is 
conducting a joint weak and strong lensing study of the cluster mass 
distribution for an unbiased sample of 25 X-ray selected clusters 
(0.15<~z<~0.9, T_X>~5keV).  This extensive HST cluster survey builds on 
existing wide-field Subaru images to yield detailed lensing profiles over 
the full radial range, from 10kpc to beyond 2000kpc. By combining the highest 
quality HST strong lensing (SL) data in the cluster cores with wide-field 
Suprime-Cam (S-Cam) weak lensing (WL) data we will (1) derive representative 
mass profile shapes out to the virial radius and (2) robustly measure the 
cluster dark matter (DM) concentrations, their dispersion with cluster mass 
and their evolution with redshift, providing precise (~10%) observational 
challenges to test cosmological models and cosmic structure formation 
scenarios.