Table 3
Frequency-dependent time lags and “time-lag core shifts” with respect to the observations at 142.33 GHz.
| ν | τ GP | τ DCCF | ⟨τ⟩ | Δr | Ωrν | |||
| (GHz) | (d) | (d) | (d) | (mas) | (pc GHz) | |||
|
|
||||||||
| 2.64 | 207.1 |
|
205.0 ± 2.0 | 0.051 ± 0.005 | 0.885 ± 0.093 | |||
| 4.85 | 128.8 |
|
136.9 ± 8.1 | 0.034 ± 0.004 | 0.922 ± 0.118 | |||
| 8.35 | 92.4 |
|
96.2 ± 3.8 | 0.024 ± 0.003 | 0.981 ± 0.127 | |||
| 10.45 | 80.6 |
|
85.8 ± 5.2 | 0.021 ± 0.002 | 1.046 ± 0.148 | |||
| 14.60 | 66.3 |
|
67.2 ± 0.9 | 0.017 ± 0.002 | 1.081 ± 0.147 | |||
| 15.00 | 64.2 |
|
63.6 ± 0.6 | 0.016 ± 0.002 | 1.047 ± 0.189 | |||
| 23.05 | 33.8 |
|
39.4 ± 5.6 | 0.010 ± 0.002 | 0.955 ± 0.194 | |||
| 32.00 | 28.6 |
|
39.8 ± 11.2 | 0.010 ± 0.003 | 1.338 ± 0.413 | |||
| 43.05 | 37.7 |
|
40.8 ± 3.1 | 0.010 ± 0.001 | 1.915 ± 0.328 | |||
| 86.24 | 24.7 |
|
24.8 ± 0.2 | 0.006 ± 0.001 | 3.585 ± 0.623 | |||
Notes. Columns: (1) observing frequency; (2) time lag from GP regression; (3) time lag from DCCF; (4) average of time lags τGP and τDCCF; (5) the angular offset in units of mas [Δr = μ⟨τ⟩]; and (6) time-lag based core position offset. An uncertainty of up to 0.4 d can be associated with τGP.
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