Table 1
Summary of the comparison between the Gaia parallaxes and the external catalogues.
| Catalogue | Nb | Outliers | ⟨ G⟩ | ϖ difference | ϖ uwu |
|---|---|---|---|---|---|
| HIPPARCOS | 62 484 | 0.1% | 8.3 | −0.118 ±0.003 | 1.25 ±0.003 |
| VLBI | 40 | 2.5% | 8.2 | − 0.07 ± 0.03 | 1.9 ±0.2 |
| HST | 51 | 33% | 11.7 | − 0.01 ± 0.02 | 2.1 ±0.3 |
| RECONS | 432 | 3% | 12.6 | −0.71 ±0.06 | 1.69 ±0.06 |
| GCVS RR Lyrae | 197 | 2% | 14.9 | −0.033 ±0.009 | 1.51 ±0.08 |
| Gaia RR Lyrae | 795 | 3% | 15.6 | −0.056 ±0.005 | 1.38 ±0.04 |
| Gaia Cepheids | 1417 | 2% | 15.6 | −0.0319 ±0.0008 | 1.53 ±0.03 |
| APOGEE | 5212 | 2% | 13.9 | −0.048 ±0.002 | 1.44 ±0.01 |
| LAMOST | 174 | 9% | 14.9 | −0.040 ±0.005 | 1.50 ±0.08 |
| SEGUE Kg | 3151 | 0.2% | 16.5 | −0.041 ±0.002 | 1.10 ±0.01 |
| LMC | 51 162 | 1% | 19.2 | −0.038 ±0.0004 | 1.098 ±0.004 |
| LMC Vr | 319 | 4% | 12.8 | −0.042 ±0.001 | 1.34 ±0.05 |
| SMC | 26 404 | 2% | 16.4 | −0.0268 ±0.0004 | 1.43 ±0.006 |
| SMC Vr | 114 | 8% | 12.5 | −0.037 ±0.002 | 1.4 ±0.1 |
| Draco | 427 | 0% | 19.3 | −0.047 ±0.008 | 1.08 ±0.04 |
| Ursa Minor | 78 | 0% | 17.4 | −0.054 ±0.008 | 1.03 ± 0.08 |
| Sculptor | 1287 | 0.3% | 19.1 | −0.028 ±0.006 | 1.11 ±0.02 |
| Sextans | 375 | 0.3% | 19.3 | −0.09 ±0.02 | 1.07 ±0.04 |
| Carina | 864 | 0% | 19.8 | −0.020 ±0.007 | 1.05 ± 0.03 |
| Crater2 | 63 | 0% | 19.1 | −0.06 ±0.03 | 0.96 ±0.09 |
| Fornax | 2659 | 0.4% | 18.8 | −0.052 ±0.004 | 1.18 ±0.02 |
| CVnI | 51 | 0% | 20.0 | -0.030 ± 0.08 | 0.91 ± 0.09 |
| LeoII | 123 | 0% | 19.5 | 0.05 ± 0.05 | 1.0 ± 0.06 |
| LeoI | 292 | 0.7% | 19.6 | −0.23 ±0.05 | 1.30 ±0.05 |
| Phoenix | 81 | 0% | 20.6 | 0.09 ± 0.07 | 1.07 ± 0.08 |
| all dSphs | 6300 | 0.3% | 19.0 | −0.044 ±0.002 | 1.13 ±0.01 |
| ICRF2 | 2347 | 0.3% | 18.8 | −0.031 ±0.003 | 1.16 ±0.02 |
| RFC2016c | 3523 | 0.3% | 18.9 | −0.031 ±0.002 | 1.15 ±0.01 |
| LQRF | 79 631 | 0.04% | 19.1 | −0.0322 ±0.0008 | 1.088 ±0.003 |
Notes. We present the total number of stars used in the comparison (Nb) as well as the percentage of outliers excluded (at 5σ, in italic if higher than 10%) as well as the median G of the sample. The parallax differences (ϖG − ϖE, in mas) and unit-weight uncertainty (uwu) that needs to be applied to the uncertainties to adjust the differences are indicated in italic when they are significant (p-value limit: 0.01).
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