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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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