Same as Fig. 1, but for the objects with follow-up observations. The grey vertical line shows when the excess was first discovered, and the grey dashed and dotted vertical lines show the photometric and spectroscopic follow-up observations, respectively. The coloured points at the follow-up dates show the follow-up detections and the crosses show the follow-up 5σ upper limits. Note: for SN 2020qxz, the time period between the SN tail and late-time signal has been cut out to better show the detections and follow-up campaign.