Kiel diagram and parameter uncertainties of our stellar sample. Left: Kiel diagram with the parameters derived through photometry. All points are color coded by their spectroscopic metallicities. Two examples of BaSTI isochrones are shown and zoomed in around the evolutionary stage of our giant stars. Central and right: the T_eff relative uncertainties and log g absolute uncertainties vs. effective temperatures for the entire sample following the same color coding as the Kiel diagram.