Assigned ID: 943 ----- Attempting Submission 1 (Sat Feb 27 00:44:15 GMT 2010) ----- We propose to use weak gravitational lensing to measure the astrophysical bias between the density of galaxies and that of the surrounding dark matter structure. The COSMOS/ACS observations provide a unique dataset for this analysis, and we will leverage recent extensions to achieve measurements an order of magnitude more precise than previously possible -- spanning both larger and smaller scales, and higher redshifts. In particular, our new 3D weak lensing catalog benefits from (i) improved photometric redshifts, especially out to z>1, and (ii) correction of the raw ACS images for charge transfer inefficiency trailing, and (iii) an improved calibration of shear measurements as a function of redshift.

COSMOLOGY 12 50000 false 0.0 0.0 false false false false false false SUPPORTED