Table 2
Comparison of the models adjusted to the PDF calculated from the position time series of the sources 0014+813, 0059+581, 1739+522, and 1334−127, depending onthe number of sessions used to derive the reduced (i.e., averaged) positions.
| Number of | Model conf. | Dir. no.1 | Dir. no.2 | Dir. no.3 | ||||
|---|---|---|---|---|---|---|---|---|
| sessions averaged | Ncomp | ∑ kn | k1∕∑ kn  |
k2∕∑ kn  |
k3∕∑ kn  |
|||
| (%) | (°) | (%) | (°) | (%) | (°) | |||
| Source : 0014+813 | ||||||||
 |
3 | 1.00 | 44% | 167 ± 32 | 31% | 178 ± 14 | 25% | 54 ± 17 |
 |
2 | 1.00 | 73% | 10 ± 53 | 27% | 173 ± 2 | ||
 |
2 | 1.00 | 85% | 35 ± 61 | 15% | 174 ± 2 | ||
| Source : 0059+581 | ||||||||
 |
2 | 1.00 | 85% | 19 ± 44 | 15% | 107 ± 6 | ||
 |
1 | 1.00 | 100% | 179 ± 72 | ||||
 |
0 | |||||||
| Source : 1739+522 | ||||||||
 |
3 | 1.01 | 64% | 173 ± 82 | 21% | 164 ± 5 | 15% | 139 ± 2 |
 |
2 | 1.00 | 83% | 146 ± 44 | 16% | 160 ± 4 | ||
 |
2 | 1.00 | 92% | 152 ± 48 | 8% | 159 ± 2 | ||
| Source : 1334-127 | ||||||||
 |
2 | 0.99 | 87% | 117 ± 42 | 13% | 176 ± 6 | ||
 |
1 | 1.00 | 100% | 162 ± 46 | ||||
 |
0 | |||||||
Notes. The first three columns indicates the number of sessions used in the averaging process to obtain the reduced position time series (Col. 1), the number of Gaussian components (or equivalently directions) adjusted to the PDF relating to the direction of astrometric variation of the source (Col. 2), and the integral value of the model (Col. 3). The next pairs of columns provide information specific to each direction extracted: the weight of that direction in the model (Cols. 4, 6, 8) and its value and uncertainty (Cols. 5, 7, 9).
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