Cluster weighted-average-mass results. Left panel: NGC 6819 mass results compared to an isochrone mass and the mass of NGC 6819 given in R. Handberg et al. (2017). Right: NGC 6791 mass results compared to an isochrone mass. The parameters of the isochrone can be found in Section 2.4.3. This plot shows the results for the lower-RGB gold sample, the lower-RGB silver sample, and the RC sample. The luminous giants are omitted due to small number statistics. The error bars on the weighted mean masses are the standard errors of the weighted mean.