Calcium triplet metallicity calibration for stars in the Galactic bulge S. Vásquez, M. Zoccali, V. Hill, O. A. Gonzalez, I. Saviane, M. Rejkuba and G. Battaglia A&A, 580 (2015) A121 Published online: 17 August 2015 DOI: 10.1051/0004-6361/201526534