Approximate location of the fields discussed in the present paper, overplotted on an optical image of the Milky Way bulge (© Serge Brunier). The large white rectangle is the area mapped by the VVV survey. Red and white circles are fields observed at low spectral resolution (R = 6500) through setup LR8, from program 187.B-0909; red and white squares are fields observed at high resolution (R = 22   500) through setup HR13, from program 187.B-0909. Crosses at b ~ −2 are the fields from program 089.B-0830, also observed through LR8. The blue star is the field, within Baade’s Window, used for the CaT calibration, and the blue triangle is the field discussed in Vásquez et al. (2013).