Photon spectrum accumulated between 0.448–0.768 s after the trigger for 3B 910814. Two best‐fit models are plotted on top of the deconvolved data: GRB function (solid line) and BPL model (dashed line; ﹩\alpha _{\mathrm{PL}\,}=-0.263﹩). Tangent slope at 25 keV is also shown: ﹩\alpha =-0.04﹩ (dotted line). Neither model is as steep as ﹩-2/ 3﹩ at low energies. The errors represent model variances.