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Fig. 4

image

Power law slope of the background-subtracted GOES long channel peak flux frequency distribution as a function of the GOES event list and LYRAFF thresholds. The left column corresponds to the thresholds of the GOES event list algorithm, while the right column corresponds to the LYRAFF algorithm applied to GOES/XRS observations. Each row then corresponds to the start (top), first fall (middle), and end (bottom) thresholds. We note that there is no plot in the middle left panel as the GOES event list does not use a first fall threshold. The error bars represent the statistical uncertainty of the power law fits given by Eq. (3). We note that there is a clear downward trend in both start threshold plots implying that the derived flare distribution depends on the choice of start threshold. In contrast, the first fall and end threshold panels show flat relationships implying that the derived flare distribution is independent of the choice of these thresholds.

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