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Table 1.
Parameters of the colour–magnitude relation for the four clusters.
| Cluster | a | b |
|---|---|---|
| A2744 | 1.61 ± 0.06 | −0.037 ± 0.003 |
| AS1063 | 1.86 ± 0.12 | −0.046 ± 0.006 |
| M0416 | 1.69 ± 0.11 | −0.037 ± 0.005 |
| M1149 | 2.00 ± 0.23 | −0.036 ± 0.011 |
Notes. We report, for each cluster, the values of the two colour-magnitude parameters, defined as in Eq. (7), with the uncertainty determined by ltsfit.
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