Table 1.
Model-fitting results of OJ 287.
| Comp. | Day | S | r | θ | D | Tb | μ | βapp |
|---|---|---|---|---|---|---|---|---|
| (Jy) | (μas) | (°) | (μas) | (1010 K) | (μas/day) | (c) | ||
| C0a | April 5 | 0.45 ± 0.05 | – | – | 17 ± 1 | 4.7 ± 0.8 | – | – |
| April 10 | 0.28 ± 0.03 | – | – | 15 ± 6 | 3.8 ± 3.1 | |||
| C0b | April 5 | 0.22 ± 0.02 | 17 ± 1 | −14 ± 4 | 10 ± 3 | 7.0 ± 4.1 | 0.3 ± 0.3 | 2.2 ± 2.2 |
| April 10 | 0.73 ± 0.07 | 18 ± 1 | −20 ± 4 | 20 ± 3 | 5.5 ± 1.7 | |||
| C1 | April 5 | 0.29 ± 0.03 | 34 ± 2 | −16 ± 3 | 20 ± 5 | 2.2 ± 1.1 | 2.4 ± 0.9 | 17.4 ± 6.5 |
| April 10 | 0.51 ± 0.05 | 40 ± 4 | −35 ± 6 | 22 ± 8 | 3.2 ± 2.3 | |||
| C2 | April 5 | 0.30 ± 0.03 | 90 ± 1 | −36 ± 1 | 12 ± 3 | 6.3 ± 3.2 | 1.4 ± 0.3 | 10.2 ± 2.2 |
| April 10 | 0.46 ± 0.05 | 96 ± 1 | −35 ± 1 | 14 ± 3 | 7.1 ± 3.2 | |||
| C3a | April 5 | 0.33 ± 0.03 | 193 ± 2 | −37 ± 1 | 22 ± 4 | 2.1 ± 0.8 | 3.1 ± 0.7 | 22.5 ± 5.1 |
| April 10 | 0.51 ± 0.05 | 204 ± 3 | −40 ± 1 | 26 ± 6 | 2.3 ± 1.1 | |||
| C3b | April 5 | 2.46 ± 0.25 | 216 ± 4 | −44 ± 8 | 100 ± 4 | 0.8 ± 0.1 | 2.3 ± 1.3 | 16.7 ± 9.4 |
| April 10 | 1.26 ± 0.13 | 227 ± 5 | −46 ± 1 | 40 ± 8 | 0.02 ± 0.01 | |||
Notes. Columns from left to right: Component label, observing day, flux density (S), radial separation from the innermost core (r), position angle of the component’s position (θ, east of north), component size (D), brightness temperature in the source frame (Tb), proper motion (μ), and apparent velocity in units of the speed of light (βapp).
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