Image Details
Caption: Figure 10.
The rebrightening of GRB 260310A (black squares), scaled from X-rays to optical assuming νc ≈ 0.1 keV and a power-law index of β ∼ 0.6. A sample of late-time afterglow rebrightenings, including AT2019pim (D. A. Perley et al. 2025), GRB 970508 (T. J. Galama et al. 1998b), GRB 210704A (assuming z ≈ 2.3; R. L. Becerra et al. 2023), EP241021a (M. Busmann et al. 2025), and EP240414a (H. Sun et al. 2025), is shown for comparison.
© 2026. The Author(s). Published by the American Astronomical Society.