Image of the globular cluster NGC 6528 with the positions of stars we have analysed in this study marked. The stars are identified by the numbers listed in the first column in Table A.1. Red circles indicate stars observed with UVES, blue circles indicate stars observed with FLAMES-UVES, and black circles indicate stars observed with HIRES. The numbers next to the circles refer to the numbers in Table A.1. The core radius of the cluster (0.13 arcmin) is indicated by a red dashed line and the half-light (0.38 arcmin) by a black solid line. Data taken from Harris (1996). The image has been smoothed with a Gaussian to roughly mimic the seeing at Paranal.