The Impact of Polarized Extragalactic Radio Sources on the Detection of CMB Anisotropies in Polarization

Table 3

Number counts in polarization at 20 GHz from WMAP and AT20G source catalogues. 𝑁_det indicates the number of objects with detected polarization, while 𝑛^up(𝑃) is the estimated contribution of AT20G objects with no polarization information or with upper limits in the fractional polarization.

		AT20G subsample
𝑃 (mJy)	𝑁det	𝑛(𝑃)	𝜎𝑛(𝑃)	𝑛^up(𝑃)
11.2	87	0.828𝐸 + 04	0.889𝐸 + 03	0.205𝐸 + 04
14.1	81	0.607𝐸 + 04	0.675𝐸 + 03	0.636𝐸 + 03
17.8	57	0.338𝐸 + 04	0.447𝐸 + 03	0.263𝐸 + 03
22.4	49	0.231𝐸 + 04	0.329𝐸 + 03	0.102𝐸 + 03
28.2	33	0.123𝐸 + 04	0.215𝐸 + 03	0.242𝐸 + 02
35.5	23	0.683𝐸 + 03	0.142𝐸 + 03	0.112𝐸 + 02
44.7	22	0.519𝐸 + 03	0.111𝐸 + 03	0.104𝐸 + 02
56.2	18	0.337𝐸 + 03	0.795𝐸 + 02	0.938𝐸 + 01
70.8	17	0.253𝐸 + 03	0.613𝐸 + 02	0.842𝐸 + 01
89.1	10	0.118𝐸 + 03	0.374𝐸 + 02	0.752𝐸 + 01
112.2	5	0.469𝐸 + 02	0.210𝐸 + 02	0.664𝐸 + 01
141.3	3	0.224𝐸 + 02	0.129𝐸 + 02	0.385𝐸 + 01
177.8	4	0.237𝐸 + 02	0.118𝐸 + 02	0.184𝐸 + 01
223.9	2	0.941𝐸 + 01	0.665𝐸 + 01	0.121𝐸 + 01
281.8	1	0.374𝐸 + 01	0.370𝐸 + 01	0.755𝐸 + 00
		5 yr WMAP sample
398.1	5	0.199𝐸 + 01	0.889𝐸 + 00
631.0	2	0.530𝐸 + 00	0.375𝐸 + 00
1072.	1	0.150𝐸 + 00	0.150𝐸 + 00