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Fig. 2.

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T90 ∝ (Liso)−0.5 correlation (solid blue line) for the GRBs with reported polarization detections (red stars), along with the high-efficiency sample (orange stars; Meng 2022) and the high-energy sample (cyan stars; Eγ, beam ≳1052 erg, obtaining a GeV/TeV detection; Sharma et al. 2021). Notably, all three samples roughly exhibit a power-law shape in their X-ray afterglows. The dashed green lines mark a T90 deviation of a factor of two, from the best-fit log (T90) = 1.67–0.5 log (Liso) relationship. This T90 ∝ (Liso)−0.5 correlation aligns closely with the predictions made by the NDAF model (solid red line), which is under the hot fireball framework.

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