Time-resolved fitting result of GRB 100826A. The left four panels show the light curve, E_p curve, PD curve, and PA curve in proper sequence for the aligned-field case, and the right three panels show the light curve, the evolution of E_p, and the PD curve for the toroidal-field case. The black squares show the observational data. The red circles and lines show our fitting results for the aligned-field case, and the blue lines show the fitting result for the toroidal-field case. The observed time-integrated PD with its 1σ error is shown as a horizontal black line with a gray region, and the predicted PD is shown as a horizontal red (blue) line for the aligned-field (toroidal-field) case. Since the orientation of the GRB and the direction of the aligned field (if any) are stochastic, the predicted time-integrated PAs are not compared with the corresponding observational values for the two cases.