Top: asymmetry of the type III burst time profile along with the errors (in blue) on the rise and decay times. The red line highlights y = x. It is clear that the decay times are longer than rise times, with 77% of the time profiles having a longer decay time than rise time. Middle: mean rise time vs mean decay time, including the power-law fit to the data for time [seconds]. Bottom: Ratio of decay time over rise time as a function of frequency.