Cluster mass profile reconstruction with size and flux magnification on the STAGES survey.

We present the first measurement of individual cluster mass estimates using weak lensing size and flux magnification. Using data from the STAGES (Space Telescope A901/902 Galaxy Evolution Survey) survey of the A901/902 supercluster we detect the four known groups in the supercluster at high significance using magnification alone. We discuss the application of a fully Bayesian inference analysis, and investigate a broad range of potential systematics in the application of the method.