Histogram of power-law decay index α (gray shaded) over all acceptably fitting bursts, as found from fitting with Eqs. (2)(α = α₂) or (3)(α = α₃) when Eq. (2)did not yield a satisfactory fit (i.e., if ), Eq. (3)yielded a better fit, and for the fit was less than 10. The red histogram is for bursts without a noticeable Gaussian component (259 bursts), and the blue histogram shows bursts with a noticeable Gaussian component (242 bursts).