Location of the fields discussed in the present study compared to the fields from the ARGOS survey (Freeman et al. 2013). Black open circles are the ARGOS fields. Red filled circles are fields observed at low spectral resolution (R = 6500) through setup LR8, from program 187.B-0909; open squares are fields observed at high resolution (R = 22   500) through setup HR13, from program 187.B-0909. Blue crosses 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) . The large rectangle shows the area mapped by the VVV survey.