Figure 2 was made using 'KW_data_plots.py'. The data are given in the files KW_expt.dat (Expt: 1st col = time, 2nd col = QMS signal, 3rd col = Analysed KW data) and KW_trace.dat (Fit: 1st col = time, 2nd col = fit). Panel A = columns 1 and 2 from KW_expt.dat, Panel B = columns 1 and 3 from KW_expt.dat and columns 1 and 2 from KW_trace.dat.