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Table 1
The multipole coefficients (μas/yr) of the velocity field.
| DR | DR1 | DR2 | DR3 | DR4 | |
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| No. sources | 555 | 268 | 257 | 40 | 515 |
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| Dipole | |||||
| d 1 | −0.7 ± 0.8 | −1.9 ± 1.0 | −1.6 ± 0.9 | −3.4 ± 1.0 | 4.2 ± 1.3 |
| d 2 | −5.9 ± 0.9 | −7.1 ± 1.1 | −6.0 ± 1.0 | −6.2 ± 1.2 | −4.6 ± 1.3 |
| d 3 | −2.2 ± 1.0 | −3.5 ± 1.2 | −2.9 ± 1.1 | −3.8 ± 1.2 | 1.4 ± 1.7 |
| Amplitude | 6.4 ± 1.5 | 8.1 ± 1.9 | 6.9 ± 1.7 | 8.0 ± 2.0 | 6.4 ± 2.5 |
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| Rotation | |||||
| r 1 | −2.6 ± 0.9 | −3.2 ± 1.2 | −2.7 ± 1.1 | −1.9 ± 1.3 | −4.3 ± 1.4 |
| r 2 | 0.4 ± 1.0 | −0.6 ± 1.2 | −0.3 ± 1.1 | 2.5 ± 1.4 | −2.1 ± 1.5 |
| r 3 | 0.8 ± 0.7 | −0.3 ± 0.9 | 0.0 ± 0.8 | −0.5 ± 0.9 | 4.1 ± 1.2 |
| Amplitude | 2.8 ± 1.5 | 3.3 ± 1.9 | 2.7 ± 1.7 | 3.2 ± 2.0 | 6.3 ± 2.4 |
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| Direction of the acceleration vector | |||||
| Right Ascension (°) | 263 ± 11 | 255 ± 11 | 255 ± 11 | 241 ± 12 | 312 ± 16 |
| Declination (°) | −20 ± 12 | −25 ± 11 | −25 ± 11 | −28 ± 12 | 13 ± 21 |
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| Pre-fit wrms | 22.1 | 19.7 | 16.3 | 9.2 | 33.3 |
| Post-fit wrms | 21.7 | 18.9 | 15.7 | 7.5 | 32.7 |
| Reduced χ2 | 1.9 | 1.9 | 1.8 | 2.1 | 1.9 |
Notes. Uncertainties are 1σ.
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