Extended Data Figure 4: Afterglow spectral energy distributions of GRB 160625B.
From: Significant and variable linear polarization during the prompt optical flash of GRB 160625B
The afterglow evolution can be described by the combination of forward-shock (dashed lines) and reverse-shock (dotted lines) emission. The best-fit model is shown with solid lines. The peak flux of the forward-shock component is about 0.4 mJy, much lower than the optical flux measured at T < T0 + 350 seconds. This shows that the forward-shock emission is negligible during the prompt phase. Error bars denote 1σ limits; upper limits are 3σ.
