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Table 1
VLBI observations used in the paper.
| Epoch | Exp. code | Telescope(a) | Vel. res. (km s−1) | 1σ noise (mJy beam−1) | Beam (mas × mas, °) | Ref. | ||
|---|---|---|---|---|---|---|---|---|
| No. | Date | MJD | ||||||
| 1 | 2004 Nov. 06 | 53 315 | EL032 | EVN(8) | 0.09 | 7 | 13.8×5.3, −57 | 1 |
| 2 | 2006 Sep. 09 | 53 987 | JVN(4) | 0.18 | 60 | 9.4×4.3, −70 | 2 | |
| 3 | 2007 Jul. 28 | 54 309 | JVN(5) | 0.18 | 90 | 9.2×4.3, −43 | 2 | |
| 4 | 2008 Oct. 25 | 54 764 | JVN(5) | 0.18 | 120 | 7.0×3.9, −79 | 2 | |
| 5 | 2013 Mar. 01 | 56 352 | ES071A | EVN(8) | 0.04 | 4–6 | 4.3×3.1, −58 | 3 |
| 6 | 2014 Feb. 28 | 56 716 | ES071B | EVN(8) | 0.04 | 4–6 | 4.0×3.4, −67 | 3 |
| 7 | 2015 Mar. 13 | 57 094 | ES071C | EVN(9) | 0.04 | 4–6 | 3.9×3.0, −53 | 3 |
| 8 | 2020 Jun. 02 | 59 002 | RD002 | EVN(4) | 0.04 | 5 | 7.5×3.5, +86 | 4 |
| 9 | 2020 Oct. 18 | 59 140 | ED048B | EVN(8) | 0.09 | 4 | 4.5×3.8,+12 | 4 |
Notes. (a) Telescopes are the EVN and the Japan VLBI Network (JVN). The number of antennas is given in parentheses.
References. (1) (Torstensson et al. 2011); (2) (Sugiyama et al. 2014); (3) (Sanna et al. 2017); (4) this work.
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