Table 1
Parameters of the preferential directions of astrometric variations identified for the sources 0014+813, 0059+581, 1739+522, and 1334−127.
| Model config. | Dir. no. 1 | Dir. no. 2 | Dir. no. 3 | Dir. no. 4 | Dir. no. 5 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Ncomp | ∑ kn | k1∕∑ kn  |
k2∕∑ kn  |
k3∕∑ kn  |
k4∕∑ kn  |
k5∕∑ kn  |
|||||
| (%) | (°) | (%) | (°) | (%) | (°) | (%) | (°) | (%) | (°) | ||
| Source : 0014+813 | |||||||||||
| 1 | 0.99 | 100% | 3 ± 36 | ||||||||
| 2 | 1.00 | 72% | 18 ± 44 | 28% | 174 ± 13 | ||||||
| 3 | 1.00 | 44% | 167 ± 32 | 31% | 178 ± 14 | 25% | 54 ± 17 | ||||
| 4 | 1.00 | 45% | 169 ± 31 | 26% | 176 ± 14 | 26% | 54 ± 17 | 3% | 3 ± 6 | ||
| 5 | 1.00 | 45% | 169 ± 30 | 24% | 176 ± 14 | 26% | 53 ± 17 | 4% | 3 ± 7 | 1% | 93 ± 10 |
| Source : 0059+581 | |||||||||||
| 1 | 0.27 | 100% | 108 ± 11 | ||||||||
| 2 | 1.00 | 15% | 107 ± 6 | 85% | 19 ± 44 | ||||||
| 3 | 1.00 | 14% | 107 ± 5 | 82% | 22 ± 47 | 4% | 7 ± 4 | ||||
| 4 | 1.00 | 15% | 107 ± 5 | 71% | 11 ± 46 | 5% | 7 ± 4 | 9% | 56 ± 7 | ||
| 5 | 1.00 | 15% | 106 ± 5 | 67% | 13 ± 42 | 5% | 7 ± 4 | 9% | 56 ± 7 | 4% | 121 ± 5 |
| Source : 1739+522 | |||||||||||
| 1 | 0.21 | 100% | 139 ± 3 | ||||||||
| 2 | 0.53 | 40% | 139 ± 3 | 60% | 164 ± 7 | ||||||
| 3 | 1.01 | 15% | 139 ± 2 | 21% | 164 ± 5 | 64% | 173 ± 82 | ||||
| 4 | 1.00 | 17% | 139 ± 2 | 21% | 164 ± 5 | 55% | 12 ± 57 | 7% | 94 ± 5 | ||
| 5 | 1.00 | 13% | 140 ± 2 | 29% | 163 ± 6 | 25% | 27 ± 18 | 19% | 91 ± 12 | 14% | 135 ± 8 |
| Source : 1334-127 | |||||||||||
| 1 | 1.00 | 100% | 131 ± 48 | ||||||||
| 2 | 0.99 | 87% | 117 ± 42 | 13% | 176 ± 6 | ||||||
| 3 | 1.00 | 39% | 13 ± 59 | 14% | 175 ± 6 | 47% | 115 ± 25 | ||||
| 4 | 1.00 | 41% | 177 ± 52 | 13% | 175 ± 6 | 43% | 110 ± 25 | 3% | 127 ± 8 | ||
| 5 | 1.00 | 41% | 179 ± 53 | 13% | 175 ± 6 | 39% | 111 ± 25 | 5% | 126 ± 10 | 2% | 92 ± 7 |
Notes. The first two columns provide information on the model configuration for each fit: number of directions extracted, i.e., Gaussian components fitted (Col. 1), and significance of the fit (Col. 2). The latter is defined by the integral of the model adjusted to the given PDF. It has a maximum value of 1 although in practice it can reach slightly larger values as a result of the least-squares fitting process. The next pairs of columns provide information specific to the directions extracted: significance of those directions (Cols. 3, 5, 7, 9, 11), and their actual value including uncertainty (Cols. 4, 6, 8, 10, 12). For each source the row written in bold indicates the model with the minimum number of components that approaches a significance of 1.00, as derived from our automated scheme (see Sect. 4.2).
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