0 Assigned ID: 845 ----- Attempting Submission 1 (Fri Apr 07 20:30:56 GMT 2017) ----- Some strong gravitational lens systems exhibit features that cannot be explained by a smooth mass distribution. A possible explanation for these anomalies is the presence of dark matter substructure of the type predicted by LCDM. Much work has been done to use these anomalous lens systems to attempt to detect individual dark matter clumps. The standard approach is to increase the complexity of the model to include a component that can account for a single dark matter clump. Some groups go on to use the clumps in their models to constrain the subhalo mass function and abundance, and in doing so assume that the modeled clump corresponds to a physical clump in the lens. Our goal is to quantify the reliability of this assumption. We will create realistic mock lenses with substructure, use them to create mock lensed images, and fit those images with single clump models. Working with mock lenses means we can quantify how systematic effects may bias the conclusions we draw about the clump's properties. Any bias in this step will propagate into the constraints placed on the mass function or abundance of dark matter. We will carry out this analysis for quasar lenses and galaxy lenses. Cosmology 0 Regular false false true SUPPORTED