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Table 1.
Number of selected stars passing each high-quality criterion and different selection cuts.
| Criteria | Number of stars |
|---|---|
| NGC 6397 | |
| 1.) ASTROMETRIC_GOF_AL < 3 | 8 445 370 |
| 2.) ASTROMETRIC_EXCESS_NOISE_SIG ≤ 2. | 8 200 243 |
| 3.) −0.23 ≤ MEAN_VARPI_FACTOR_AL ≤ 0.32 | 8 195 763 |
| 4.) VISIBILITY_PERIODS_USED > 8 | 7 768 205 |
| 5.) G < 19 mag | 3 507 704 |
| 6.) Between rt and 5 × rt | 1 789 728 |
| 7.) With similar PM as the cluster | 434 |
| 8.) Stars in the cluster CMD | 120 |
| NGC 2808 | |
| 1.) ASTROMETRIC_GOF_AL < 3 | 286 944 |
| 2.) ASTROMETRIC_EXCESS_NOISE_SIG ≤ 2. | 280 162 |
| 3.) −0.23 ≤ MEAN_VARPI_FACTOR_AL ≤ 0.32 | 275 781 |
| 4.) VISIBILITY_PERIODS_USED > 8 | 273 149 |
| 5.) G < 19 mag | 125 699 |
| 6.) Between rt and 5 × rt | 101 782 |
| 7.) With similar PM as the cluster | 424 |
| 8.) Stars in the cluster CMD | 126 |
| NGC 6266 (with normal cuts) | |
| 1.) ASTROMETRIC_GOF_AL < 3 | 7 008 462 |
| 2.) ASTROMETRIC_EXCESS_NOISE_SIG ≤ 2. | 6 667 043 |
| 3.) −0.23 ≤ MEAN_VARPI_FACTOR_AL ≤ 0.32 | 6 156 844 |
| 4.) VISIBILITY_PERIODS_USED > 8 | 3 636 806 |
| 5.) G < 19 mag | 1 228 027 |
| 6.) Between rt and 5 × rt | 159 567 |
| 7.) With similar PM as the cluster | 6 784 |
| 8.) Stars in the cluster CMD | 2 155 |
| NGC 6266 (with stricter cuts) | |
| 1.) Between rt and 5 × rt | 159 567 |
| 2.) With similar PM as the cluster | 1 729 |
| 3.) Stars in the cluster CMD | 107 |
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