Based on
observations collected with the VLT on Cerro Paranal (Chile) and
the NTT on La Silla (Chile) operated by the European Southern
Observatory in the course of the observing proposals 63.O-0005,
64.O-0149, 64.O-0158, 64.O-0229, 64.P-0150, 65.O-0048, 65.O-0049,
66.A-0547, 68.A-0013, and 69.A-0014.