|ASKAP has a voltage capture capability that
is designed to be used to localise Fast Radio Bursts (FRBs). Each antenna can
store up to
12 seconds of data for 36 dual-polarisation beams in a ring buffer. The
ring buffer can be stopped and downloaded when an FRB is detected using
a real-time detection pipeline. Here we triggered the download manually
while ASKAP antennas 8 and 9 where observing the radio source Virgo A.
The plots show the results of correlating data from a single 1 MHz
channel, using 128 sub-channels. Panel A: Phase (colour) vs time (y
axis) and channel (x axis). The drift is because the data are not fringe
stopped. Panel B, C: section of the time series from each antenna. Panel
D: Auto and cross correlation amplitudes vs sub-channel. Panel E: Cross
correlation phase vs sub channel. F: Lag spectrum.