The Australia Telescope
20 GHz (AT20G) Survey
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The AT20G Survey

The AT20G Survey is a blind 20 GHz survey of the entire southern sky with |b|>1.5o. Observations were carried out using the Australia Telescope Compact Array (ATCA) from 2004-2008. The final AT20G catalogue consists of 5890 sources above a 20 GHz flux density limit of 40 mJy and includes near-simultatneous observations at 4.8 and 8.6 GHz for most sources south of -15o.

A full description of the survey and resulting catalogue is presented in the source catalogue paper: Murphy, T. et al. 2010, MNRAS, 402, 2403. A detailed analysis of the AT20G sample is presented in Massardi, M. et al., 2011, MNRAS, 412, 318.


The distribution of sources, divided into 20 GHz flux bins. The empty patches near the equator at approximately 18 hrs are due to poor weather during the observations.
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