Table 3
Summary of the LQAC-4 compilation and the cross-identification with the Gaia-DR1 catalogue.
| No. of | No. of | No. of |  |
 |
σαcos δ | σδ |  |
 |
|
|---|---|---|---|---|---|---|---|---|---|
| name | quasars | quasars | quasars | (mas) | (mas) | (mas) | (mas) | (mas) | (mas) |
| taken | cross-id | ||||||||
| for | with | ||||||||
| coord. | Gaia | ||||||||
| ICRF2 (A) | 3414 | 3414 | 2314 | 0.26 | 1.24 | 37.56 | 35.49 | 0.78 | 0.74 |
| VLBA (B) | 7213 | 3800 | 1 973 | –0.01 | 0.84 | 66.90 | 55.90 | 1.51 | 1.26 |
| VLA (C) | 1858 | 151 | 30 | 19.35 | 24.27 | 247.90 | 278.70 | 45.26 | 50.88 |
| JVAS (D) | 2118 | 255 | 105 | 6.75 | 2.85 | 16.61 | 28.40 | 1.62 | 2.77 |
| SDSS (E) | 384 834 | 383 742 | 217 748 | –6.39 | –15.48 | 51.56 | 73.70 | 0.11 | 0.16 |
| 2QZ (F) | 23 660 | 20 355 | 15 283 | 5.66 | 86.79 | 227.83 | 226.75 | 1.84 | 1.83 |
| LRG (G) | 9058 | 6528 | 1 258 | 7.81 | –19.12 | 53.32 | 47.78 | 1.50 | 1.34 |
| FIRST (H) | 969 | 131 | 105 | 39.48 | 0.81 | 252.06 | 326.79 | 24.60 | 31.89 |
| HB (I) | 6720 | 3659 | 3093 | 85.38 | –128.82 | 245.75 | 241.62 | 4.42 | 4.34 |
Notes. The table includes: number of quasars for each catalogue of the LQAC-4 compilation (Col. 2); number of quasars with the most accurate equatorial coordinates taken from the corresponding catalogue of the line (Col. 3); number of objects cross-identified with Gaia (Col. 4); mean for the difference of equatorial coordinates (Cols. 5 and 6); standard deviation for the difference of equatorial coordinates (Cols. 7 and 8); standard deviation for the difference mean (Cols. 9 and 10).
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