Image Details
Caption: Figure 18.
Histograms of the photon index distribution for X-ray flares (red solid line) and prompt emission (power-law model, blue solid line). (a) Distribution for the full GRB sample; (b) XRF subclass, (c) XRR subclass, (d) C-GRB subclass.
© 2026. The Author(s). Published by the American Astronomical Society.