Comparison of T_eff and log(g) of stars in each cluster with Dartmouth isochrones (Dotter et al. 2008) for the metal-rich clusters NGC 6528 and NGC 6553. For each cluster we show the results based on the MILES and Coelho libraries and a third panel with the weighted average of the results from both libraries. The parameters of age, [Fe/H], and [α/Fe] for the blue thick isochrones were taken from Table 2. The cyan thin isochrones have the same age and [Fe/H] as the blue ones, but with the limits [α/Fe] = −0.2 dex and +0.8 dex. The black dots represent member stars of each cluster, and grey dots are non-members.