The extraordinary linear polarisation structure of the southern
  Centaurus A lobe revealed by ASKAP
  We present observations of linear polarisation in the southern radio lobe of
Centaurus A, conducted during commissioning of the Australian Square Kilometre
Array Pathfinder (ASKAP) telescope. We used 16 antennas to observe a 30 square
degree region in a single 12 hour pointing over a 240 MHz band centred on 913
MHz. Our observations achieve an angular resolution of $26\times33$ arcseconds
(480 parsecs), a maximum recoverable angular scale of 30 arcminutes, and a
full-band sensitivity of 85 $\muup$Jy beam$^{-1}$. The resulting maps of
polarisation and Faraday rotation are amongst the most detailed ever made for
radio lobes, with of order 10$^5$ resolution elements covering the source. We
describe several as-yet unreported observational features of the lobe,
including its detailed peak Faraday depth structure, and intricate networks of
depolarised filaments. These results demonstrate the exciting capabilities of
ASKAP for widefield radio polarimetry.
