Table 2
VLA map specifications for U Her.
| Date | HPBW | rms | S/N | ||
|---|---|---|---|---|---|
| maj.a. | min.a. | p. a. | |||
| (″) | (″) | (◦) | (Jy b.−1) | ||
| 1990 Feb. 26 | 0.091 | 0.081 | 71.31 | 0.012 | 1080 |
| 1990 June 03 | 0.130 | 0.106 | 54.79 | 0.015 | 500 |
| 1991 Oct. 20 | 0.409 | 0.106 | −65.62 | 0.021 | 380 |
| 1992 Dec. 28 | 0.075 | 0.072 | −24.46 | 0.017 | 420 |
Notes. maj.a.: half-power beam width (HPBW) for the major axis of the best-fit three-dimensional Gaussian component to the synthesised beam; min.a.: HPBW for the minor axis; p.a.: position angle of the major axis (E of N); rms: the root-mean-square noise fluctuations in signal-free channels in units of Jansky per beam area; S/N: signal-to-noise ratio or ‘dynamic range’ in the channel with strongest signal.
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