Application of the model to the 2014 nonthermal flare from Sgr A^⋆. Left panel: SED evolution during the 2014 bright flare of Sgr A^⋆ (symbols). Snapshots of model spectra (every t_cr is plotted with thin gray lines). The thick lines represent the average model spectra during the four observation time windows. Right panel: NIR and X-ray model light curves (solid lines) plotted against the data of the 2014 flare (symbols). After the peak time of the flare, the particles escape from the active region on a timescale 12.5 R/c. The data are adopted from Ponti et al. (2017).