Discovery and confirmation plots of PSR J0443−68. Top row: a discovery observation showing the time–phase plot (left) along with the integrated pulse profile (top subpanel) and the frequency–phase diagnostic plot (right). Bottom row: a confirmation observation obtained using the Parkes UWL receiver over 704–2500 MHz, showing with the corresponding time–phase and frequency–phase diagnostic plots. "arb." denotes "arbitrary units."