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R.A.C. Croft (Carnegie Mellon University)
The mean shear profile of distant galaxies around foreground galaxies has been used to constrain the galaxy-mass correlation function through weak gravitational lensing. Here we examine whether faint foreground galaxies misidentified as background sources could contaminate these measurements through their intrinsic alignments. We use Nbody simulations of halos in a CDM cosmology, and find a significant signal. We then present an application to data from the Sloan Digital Sky Survey.