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

摘要: We present the first measurement of individual cluster mass estimates using weak lensing size and flux magnification. Using data from HST STAGES (Space Telescope A901/902 Galaxy Evolution Survey) survey supercluster we detect four known groups in at high significance magnification alone. discuss application a fully Bayesian inference analysis, investigate broad range potential systematics method. compare our results to previous shear analysis same field finding recovered signal-to-noise magnification-only 45 110 per cent shear-only analysis. On case-by-case basis find consistent constraints on virial radius, that for full sample, be factor 0.77 ± 0.18 lower than measurements.