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Spectral Properties of X-Ray Flares in Gamma-Ray Bursts

Xiongwei Bi et al 2026 The Astrophysical Journal 1011 .

Caption: Figure 25.

Temporal evolution of N_H during preflare, flare, and postflare phases of GRB X-ray flares. (a) Bright-flare sample; (b) faint-flare sample.