Table 1.
Observational details.
| Array | Observation | Antennas | Source | Pointing position |
Integration | Beam size | Position | rms (a) | |
|---|---|---|---|---|---|---|---|---|---|
| date | name | α2000 | δ2000 | time | angle | ||||
| (h:m:s) | (°:′:″) | (h) | (mas × mas) | (°) |  |
||||
| VLBA | 27 May 1998 | Br, Fd, Hn, Kp, La, Mk, Nl, Ov, Pt, Sc | TXS 2226-184 | 22:29:12.494600 | −18:10:47.24200 | 7.16 | 1.81 × 0.54 | −11.26 | 5.9 (b), 0.5 |
| VLBA | 12 June 2017 | Fd, Hn, Kp, La, Mk, Nl, Ov, Pt, Sc | TXS 2226-184 | 22:29:12.494600 | −18:10:47.24200 | 4.13 | 1.42 × 0.36 | −14.72 | 15.3 (b), 0.4 |
| J2232-1659 (c) | 22:32:22.564573 | −16:59:01.89226 | 4.21 | 1.34 × 0.39 | −13.55 | 1.6 | |||
| EVN | 29 October 2017 | Ef, Mc, On, Ys, Hh | TXS 2226-184 | 22:29:12.494600 | −18:10:47.24200 | 2.95 | 4.16 × 0.97 | −26.99 | 21.7 (b), (d), 0.2 |
| J2232-1659 (c) | 22:32:22.564573 | −16:59:01.89226 | 3.04 | 5.86 × 0.92 | −30.28 | 1.5(e) | |||
| EVN | 09 June 2018 | Ef, Mc, On, Ys, HH, Sr, Jb | TXS 2226-184 | 22:29:12.494600 | −18:10:47.24200 | 3.79 | 2.11 × 1.41 | +7.08 | 5.1 (b), 0.2 |
Notes.
The rms obtained for the radio continuum by averaging the channels that do not show any maser emission is indicated in boldface.
Phase-reference source at 1.4° from TXS 2226-184. The errors of α2000 and δ2000 are 0.291 mas and 0.409 mas, respectively (see Goddard Space Flight Center VLBI group, February 23, 20154).
The measured rms per channel was 5 mJy beam−1, which needs to be multiplied by the estimated flux correcting factor of 4.35 (see Sect. 3.4).
The measured rms was 0.34 mJy beam−1, which needs to be multiplied by the estimated flux correcting factor of 4.35 (see Sect. 3.4).
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