Table 2.
Number of RRLs from Clement et al. (2001) and OGLE-IV catalogues, and retrieved in each stage of the methods referred to in Sect. 4.
| Cluster | NClem | NOGLE | Nnew | Ntot | NGaia | Nfilt |
|---|---|---|---|---|---|---|
| NGC 6266 | 230 | 231 | 12 | 242 | 233 | 123 |
| NGC 6441 | 81 | 56 | 11 | 92 | 87 | 37 |
| NGC 6626 | 22 | 27 | 11 | 33 | 32 | 20 |
| NGC 6638 | 28 | 29 | 13 | 41 | 41 | 28 |
| NGC 6642 | 17 | 29 | 13 | 30 | 29 | 21 |
| NGC 6717 | 1 | 4 | 3 | 4 | 4 | 3 |
Notes. Number of RRLs from Clement et al. (2001, NClem) and OGLE-IV (NOGLE); number of new RRLs, present in OGLE but not in Clement (Nnew); number of RRLs in the combined catalogues (Ntot); number of RRLs detected in Gaia EDR3 (Gaia Collaboration 2021a) before and after applying the quality flags (NGaia and Nfilt).
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