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Table 1
Journal of observations of the scientific frames together with the derived photometric calibration coefficients.
| Exposure times [s] | ||||||
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| Observ. | Frames | U | B | V | I C | N |
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| LCO | long | – | 900 | 600 | 600 | 1 |
| short | 4 × 30 | 2 × 20 | 10 | 10 | 1 | |
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| CTIO | long | 1500 | 1200 | 900 | 700 | 4 |
| medium | 200 | 100 | 100 | 100 | 4 | |
| short | 30 | 30 | 30 | 30 | 4 | |
| vshort | 10 | 7 | 5 | 5 | 4 | |
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| Calibration and extinction coefficients | ||||||
| Coefficient | LCO | CTIO | ||||
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| u 1 | +4.528 ± 0.006 | +3.254 ± 0.007 | ||||
| u 2 | +0.125 ± 0.011 | −0.034 ± 0.013 | ||||
| u 3 | +0.490 ± 0.010 | +0.450 | ||||
| b 1 | +2.938 ± 0.003 | +2.015 ± 0.021 | ||||
| b 2 | +0.050 ± 0.004 | +0.120 ± 0.025 | ||||
| b 3 | +0.250 ± 0.010 | +0.250 | ||||
| v 1 | +2.864 ± 0.003 | +1.802 ± 0.013 | ||||
| v 2 | −0.068 ± 0.004 | −0.048 ± 0.016 | ||||
| v 3 | +0.160 ± 0.010 | +0.160 | ||||
| i 1 | +3.757 ± 0.007 | +2.676 ± 0.020 | ||||
| i 2 | +0.039 ± 0.009 | −0.019 ± 0.021 | ||||
| i 3 | +0.080 ± 0.010 | +0.080 | ||||
Notes. N indicates the number of fields observed for each cluster region.
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