Table 3: Number counts in polarization at 20 GHz from WMAP and AT20G source catalogues. indicates the number of objects with detected polarization, while is the estimated contribution of AT20G objects with no polarization information or with upper limits in the fractional polarization.

AT20G subsample
(mJy)

11.2 87 0.828 + 04 0.889 + 03 0.205 + 04
14.1 81 0.607 + 04 0.675 + 03 0.636 + 03
17.8 57 0.338 + 04 0.447 + 03 0.263 + 03
22.4 49 0.231 + 04 0.329 + 03 0.102 + 03
28.2 33 0.123 + 04 0.215 + 03 0.242 + 02
35.5 23 0.683 + 03 0.142 + 03 0.112 + 02
44.7 22 0.519 + 03 0.111 + 03 0.104 + 02
56.2 18 0.337 + 03 0.795 + 02 0.938 + 01
70.8 17 0.253 + 03 0.613 + 02 0.842 + 01
89.1 10 0.118 + 03 0.374 + 02 0.752 + 01
112.2 5 0.469 + 02 0.210 + 02 0.664 + 01
141.3 3 0.224 + 02 0.129 + 02 0.385 + 01
177.8 4 0.237 + 02 0.118 + 02 0.184 + 01
223.9 2 0.941 + 01 0.665 + 01 0.121 + 01
281.8 1 0.374 + 01 0.370 + 01 0.755 + 00

5 yr WMAP sample

398.1 5 0.199 + 01 0.889 + 00
631.0 2 0.530 + 00 0.375 + 00
1072. 1 0.150 + 00 0.150 + 00