Table 2.
Uncertainties considered in evaluating the absolute position errors (Δα and Δδ) of the VLBA K-band epochs.
| Epoch | Phase reference |
εrms | Δα | Δδ | ||
|---|---|---|---|---|---|---|
 |
 |
|||||
| (mas) | (mas) | (mas) | (s) | (mas) | ||
| VLBA 2018.16 | 0.09 | 0.13 | 0.02 | 0.09 | 6 × 10−6 | 0.14 |
| VLBA 2018.83 | 0.05 | 0.10 | 7 × 10−6 | 0.14 | ||
Notes. The columns indicate the epoch considered; the position errors 
and 
for the right ascension and declination of the phase reference (P.R.) J0802+2509, respectively; the thermal noise computed according to Reid & Honma (2014), εrms; and the total uncertainly calculated for αJ2000 and δJ2000, indicated as Δα and Δδ, respectively.
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