  LUNASKA (Lunar UHE Neutrino Astrophysics with the Square Kilometre Array) is
a theoretical and experimental project developing the lunar Cherenkov technique
for the next generation of giant radio-telescope arrays. Here we report on a
series of observations with ATCA (the Australia Telescope Compact Array). Our
current observations use three of the six 22m ATCA antennas with a 600 MHz
bandwidth at 1.2-1.8 GHz, analogue dedispersion filters to correct for the
typical night-time ionospheric dispersion, and state-of-the-art 2 GHz
FPGA-based digital pulse detection hardware. We have observed so as to maximise
the UHE neutrino sensitivity in the region surrounding the galactic centre and
to Centaurus A, to which current limits on the highest-energy neutrinos are
relatively weak.
