Table 1
Summary of all ALMA data sets employed in this study.
| Project | Date | Nant | ton | PWV | Bmin | Bmax | DR | Δ (RA, Dec) |
|---|---|---|---|---|---|---|---|---|
| (s) | (mm) | (m) | (m) | (mas) | ||||
| 2013.1.00879.S | 02-Sep-2014 | 34 | 1463 | 1.0 | 32 | 1052 | 69 | −80, 95 |
| 2016.1.01552.S | 21-Nov-2016 | 43 | 1851 | 2.1 | 15 | 704 | 67 | 32, −65 |
| 19-Mar-2017 | 40 | 685 | 1.6 | 15 | 287 | 34 | −11, 24 | |
| 2017.1.00288.S | 08-Oct-2017 | 51 | 2268 | 0.5 | 41 | 16 196 | 99 | −19, −1 |
| 21-Oct-2017 | 49 | 2268 | 1.4 | 41 | 16 196 | 64 | −15, 0 | |
| 22-Oct-2017 | 46 | 2268 | 1.3 | 41 | 16 196 | 62 | −13, 0 | |
| 27-Oct-2017 | 47 | 2271 | 0.7 | 135 | 14 851 | 94 | −14, −3 | |
| 29-Oct-2017 | 45 | 2268 | 1.5 | 113 | 13 894 | 37 | −15, −2 |
Notes.
Nant
= number ofantennas in the array; ton
= on-source integration time; PWV = precipitable water vapour;
Bmin = shortest projected baseline; Bmax
= longest projected baseline; DR = dynamic range of the continuum data;
Δ(RA, Dec) = astrometry offsets for the continuum peak, relative to the phase centre set at
α2000 = 19h37m00
890, δ2000 = +07°34′09.60′′.
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