A polarization survey of bright extragalactic AT20G sources

We present polarization data for 180 extragalactic sources extracted from the Australia Telescope 20 GHz (AT20G) survey catalogue and observed with the Australia Telescope Compact Array during a dedicated, high sensitivity run (... 1 mJy). For the sake of completeness, we extracted the polarization...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2013-12, Vol.436 (4), p.2915-2928
Main Authors: Massardi, M., Burke-Spolaor, S. G., Murphy, T., Ricci, R., López-Caniego, M., Negrello, M., Chhetri, R., De Zotti, G., Ekers, R. D., Partridge, R. B., Sadler, E. M.
Format: Article
Language:English
Subjects:
Anisotropy
Measurement
Space telescopes
Star & galaxy formation
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Summary:We present polarization data for 180 extragalactic sources extracted from the Australia Telescope 20 GHz (AT20G) survey catalogue and observed with the Australia Telescope Compact Array during a dedicated, high sensitivity run (... 1 mJy). For the sake of completeness, we extracted the polarization information for seven extended sources from the 9 yr Wilkinson Microwave Anisotropy Probe co-added maps at 23 GHz. The full sample of 187 sources constitutes a ...99 per cent complete sample of extragalactic sources brighter than S20GHz = 500 mJy at the selection epoch with declination ... < -30... The sample has a 91.4 per cent detection rate in polarization at ...20 GHz (94 per cent if considering the subsample of point-like sources). We have measurements also at 4.8 and 8.6 GHz within ~1 month of the 20 GHz observations for 172 sources to reconstruct the spectral properties of the sample in total intensity and in polarization: 143 of them have a polarization detection at all three frequencies. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stt1717