Table 1: Median, mean, and of the fractional polarization for flat-spectrum sources in the almost complete subsample of the AT20G surveys at different observational frequencies and flux ranges. refers to the total number of objects in the corresponding flux range; to the number of objects with 5- and 8-GHz measurements; to the number of flat-spectrum sources; to the number of flat-spectrum sources with polarization detection.

(Jy)

20 GHz

≥1.0 130 114 110 85 2.05 2.82 3.72
≥0.5 315 287 264 188 2.01 2.76 3.84
0.5, 1) 185 173 154 103 1.92 2.72 3.92

8.6 GHz

≥1.0 110 87 2.00 2.52 3.00
≥0.5 264 180 1.76 2.34 2.85
0.5, 1) 154 93 1.54 2.21 2.73

4.8 GHz

≥1.0 110 93 1.90 2.31 2.71
≥0.5 264 186 1.71 2.25 2.69
154 93 1.59 2.20 2.68