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Table 1.
Catalogues used for this work with the number of RRab stars and radial coverage in projected galactocentric distance for each catalogue in degrees and parsecs.
| Survey | Number of stars | Radius coverage | Radius coverage |
|---|---|---|---|
| (°) | (kpc) | ||
| VVV1 | 960 | 1.7 | 0.24 |
| VVV2 | 14 882 | 10 | 1.46 |
| OGLE | 27 480 | 8 | 1.17 |
| Gaia | 21 528 | 30 | 4.80 |
| Total | 64 850 | 30 | 4.80 |
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