Table 2
Ranges of distance modulus μd improvement from the use of Gaia end of mission parallax priors.
| Range A | Range A–B | Range B | Range B–C | Range C | |
|---|---|---|---|---|---|
| Survey | (% of stars) | border | (% of stars) | border | (% of stars) |
| APOGEE DR14 | 15.3 | 11. m3 | 77.9 | 15. m4 | 6.8 |
| GALAH DR1 | 97.6 | 13. m 8 | 2.4 | ∞ | – |
| GCS | 99.9 | 11. m 3 | 0.1 | ∞ | – |
| Gaia-ESO DR2 | 28.2 | 10. m 8 | 65.9 | 15. m9 | 5.8 |
| LAMOST DR3 | 62.9 | 11. m 3 | 34.1 | 15. m9 | 3.0 |
| LAMOST GACa DR2 | 63.3 | 12. m3 | 35.9 | 16. m9 | 0.7 |
| LAMOST GAC VB DR2 | 78.3 | 12. m 3 | 21.7 | ∞ | – |
| LAMOST-Cannona | 51.7 | 12. m3 | 44.8 | 15. m4 | 3.5 |
| RAVE DR5 | 97.9 | 15. m 4 | 2.0 | 19. m0 | – |
| RAVE-ona | 95.9 | 14. m4 | 4.1 | 17. m4 | 0.1 |
| SEGUE | 2.8 | 9. m 2 | 60.5 | 13. m8 | 36.8 |
| TESS-HERMES DR1 | 99.8 | 11. m 3 | 0.2 | ∞ | – |
| Total | 61.7 | – | 33.7 | – | 4.6 |
Notes. Column 1: survey label (see Table 1 for references); Cols. 2, 4 and 6: percentage of survey stars within ranges A, B, and C (see Sect. 4.1 for definitions of these ranges). Cols. 3 and 5: distance modulus values at range borders. The last row shows what fraction of the total number of stars in our sample (see the last row of Table 1) falls within each range. (a) LAMOST GAC, LAMOST-Cannon, and RAVE-on were processed but not included in the total, as they contain the same stars as LAMOST DR3 and RAVE DR5.
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