Plot of fitted low‐energy power‐law index against ﹩E_{\mathrm{peak}\,}﹩. The spectrum chosen for each burst is the one with the largest value of α. Diamonds indicate bursts fitted with a broken power‐law model. The SSM‐violating region is bounded from below by the "death line" (dashed), and the acceptable region is bounded by the ﹩-3/ 2﹩ line (dotted). Points where the error bars on ﹩\alpha _{25}﹩ exceed the plot area were omitted for clarity.