 ![Overview of Apertif observations of R0 (top) and R0 (bottom). Blue diamonds indicate observations without detected bursts, red triangles indicate observation with detected bursts. Along the vertical axis the observing mode is noted. R0 was observed for a total of ${\sim}000$ hours, and R0 for ${\sim}$000 hours.[]{data-label="fig:obs"}](obs_r0 "fig:"){width="\columnwidth"}