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Table 1
Summary of the observations.
| Instrument | Setup | R | λ-range | Exp. time (s) | Exp. time (s) | Exp. time (s) | |
| (nm) | NGC 104 (47 Tuc) | NGC 6121 (M 4) | NGC 6809 (M 55) | ||||
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|
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| GIRAFFE | HR 13 | 22500 | 612.0−640.5 | 2×1200 | 1×2700 | 2×3600 | |
| HR 15 | 19300 | 660.7−696.5 | 2×1200 | 1×1800 | 2×2770 | ||
| HR 19 | 14000 | 774.5−833.5 | 2×2700 | 2×2700 | 2×2770 | ||
| UVES−fibre | Red 580 | 47000 | 480−680 | 2×3600 + 4×1200 | 3×2700 + 1×1800 | 2×3600 + 4×2770 | |
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