Table 6.
Size comparison between VLBI measurements and variability.
| θvar, 15 GHz | θvar, νr | θVLBI, νr | θVLBI, 43 GHz | |
|---|---|---|---|---|
| MJD | (mas) | (mas) | (mas) | (mas) |
| (1) | (2) | (3) | (4) | (5) |
| 56381 | 0.055 ± 0.002 | 0.040 ± 0.003 | 0.043 ± 0.003 | 0.036 ± 0.003 |
| 57357 | 0.083 ± 0.007 | 0.061 ± 0.006 | 0.057 ± 0.003 | 0.049 ± 0.002 |
| 57385 | 0.083 ± 0.007 | 0.058 ± 0.006 | 0.061 ± 0.003 | 0.056 ± 0.003 |
| 57401 | 0.083 ± 0.007 | 0.062 ± 0.006 | 0.066 ± 0.004 | 0.056 ± 0.003 |
| 57449 | 0.122 ± 0.002 | 0.088 ± 0.005 | 0.051 ± 0.003 | 0.045 ± 0.002 |
Notes. (1) Date close to flare 2–6, (2) variability size estimated from the variability time scale at 15 GHz, (3) variability size at turnover frequency νr extrapolated from the variability size at 15 GHz, θvar, 15 GHz, using the jet geometry of ϵ = 0.44, (4) the extrapolated VLBI size at turnover frequency from the VLBI size at 43 GHz, and (5) the size directly determined by VLBI observations at 43 GHz using the VLBI data from the VLBA-BU-Blazar monitoring program (Jorstad et al. 2017).
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