Extended Data Fig. 4: Comparison of the temporal evolution of the observed optically thin radio emission with different rising and declining power-law functions.

The presented radio emission is at a frequency of 15 GHz (black solid line and markers). The various power-law functions for both the rise of the emission (since the last non-detection) and its decline are presented as dashed curves (representing various predictions, see details in Methods). The black triangle represents a 3σ non-detection limit (based on the average between the 22 GHz and 6 GHz limits).