Table 4
Image parameters for the three detected sources in the top three rows (see Fig. 1) and the brightness upper limits for the non-detections.
| Source name | Beam size | PA | Peak br. | RMS br. |
| mas × mas | ° | μJy/beam | μJy/beam | |
|
|
||||
| J2228+0110 | 6.34 × 4.56 | 65.5 | 267 | 19 |
| VLA-4 | 4.22 × 3.23 | 77.2 | 341 | 45 |
| FIRST-3 | 4.02 × 3.04 | 89.9 | 425 | 54 |
|
|
||||
| FIRST-1 | 3.97 × 2.85 | 98.8 | <389 | 56 |
| FIRST-2 | 3.97 × 2.89 | 97.3 | <398 | 57 |
| FIRST-4 | 3.96 × 2.90 | 95.9 | <457 | 65 |
| FRIST-5 | 3.99 × 3.01 | 88.5 | <475 | 68 |
| FIRST-6 | 4.04 × 3.06 | 85.6 | <424 | 61 |
| NVSS-1 | 4.08 × 3.11 | 83.5 | <383 | 55 |
| NVSS-2 | 3.94 × 2.71 | 102.0 | <485 | 69 |
| NVSS-3 | 3.95 × 2.87 | 96.9 | <476 | 68 |
| VLA-1 | 3.97 × 2.75 | 101.8 | <430 | 61 |
| VLA-2 | 3.95 × 2.74 | 101.7 | <449 | 64 |
| VLA-3 | 3.94 × 2.70 | 102.5 | <491 | 70 |
| VLA-5 | 4.13 × 3.16 | 82.1 | <324 | 46 |
Notes. Column 1: the three detected sources (top) and the twelve undetected targets (bottom); Col. 2: restoring beam size at FWHM; Col. 3: position angle of the restoring beam major axis, measured from north through east; Col. 4: peak brightness for the detected sources (top) and 7σ upper limits for the non-detections (bottom); Col. 5: off-source image noise (top) and the noise in the dirty image (bottom). The different beam size and image noise values are caused by missing or flagged antennas and/or different on-source times (see text for details).
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