Table 1.
Observation parameters: continuum.
| Bands (a) | Freq. | Epoch | Int. Time | Synth. Beam | PA | 1σ rms (b) | Detect. |
|
|---|---|---|---|---|---|---|---|---|
| (GHz) | (min) | (arcsec) | (°) | (μJy beam−1) | MM1 (c) | MM3 (c) | ||
| C (1) | 6.0 | I | 14 | 4.66 × 0.77 | +9.02 | 23 | N | Y |
| II | 16 | 2.61 × 1.05 | −0.07 | 23 | N | Y | ||
| Ku (2) | 15.0 | I | 16 | 1.84 × 0.46 | +3.29 | 11 | N | Y |
| II | 16 | 1.12 × 0.45 | −6.32 | 13 | N | Y | ||
| K (3) | 20.0 | I | 32 | 1.28 × 0.30 | +0.28 | 16 | Y | Y |
| II | 19 | 0.78 × 0.32 | −9.98 | 15 | N | N | ||
Notes.
The following maser lines were detected in the continuum windows (the listed lines were flagged during the data processing to avoid false detections in the continuum images): (1) 6.18, 6.67, 7.68, and 7.83 GHz; (2) 14.30 GHz; (3) 20.97 and 20.35 (epoch I only) GHz.
Hereinafter we adopt the source naming from Brogan et al. (2019).
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