Table A.1
Classification of stars into single and non-single-star candidates.
| Gaia DR2 parameter | Visual S1 95% quantile | Vis. S3 [%] | Vis. S5 [%] | Correlation S1 95% quantile | Corr. S3 [%] | Corr. S4 [%] |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| ruwe | 1.58 | 64 | 92 | 1.4 | 33 | 78 |
| parallax_error [mas] | 0.08 | 60 | 92 | 0.04 | 51 | 83 |
| proper motion RA/Dec error [mas yr−1] | 0.12 | 60 | 92 | 0.07 | 47 | 82 |
| astrometric_excess_noise | 0.18 | 62 | 92 | 0.10 | 35 | 78 |
| astrometric_excess_noise_sig | 13 | 62 | 92 | 5 | 34 | 78 |
| RA/Dec J2015.5 error [mas] | 0.06 | 59 | 91 | 0.03 | 49 | 83 |
| astrometric_n_bad_obs_al/ | 0.07 | 21 | 29 | 0.06 | 18 | 30 |
| astrometric_n_good_obs_al | ||||||
| astrometric_sigma5d_max | 0.08 | 59 | 92 | 0.05 | 43 | 80 |
Notes. Classification is based on Gaia DR2 quality indicators for the goodness of a single-star astrometric fit. Column 1 gives the indicators. Columns 2 and 5 give the 95% quantiles for the indicators, derived by using sample S1 of the ‘visual’ and ‘correlation’ methods (i.e. samples of single-star candidates). Columns 3, 4, 6, and 7 (i.e. samples of non-single-star candidates) give the percentage of the sources in the samples that have a value greater than the corresponding 95% quantile.
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