X-ray spectral fits for GRB 070704 during the (a) preflare, (b) flare, and (c) postflare phases. Upper panels: unfolded spectra (data points with 1σ error bars) and the best-fit absorbed power-law model (black solid line). Lower panels: data-to-model ratio. The horizontal solid line marks the ideal ratio of 1.0. The C-stat/dof values (0.84, 0.95, 0.78) are indicated in each panel. The fitting energy range is 0.3–10 keV.