Relativistic propagation in GRB afterglows filters intrinsic QPOs via equal-arrival-time integration, acting as a stationary low-pass filter for constant Gamma and a time-dependent filter causing frequency drift during deceleration.
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Spectral width increases with time in GRB 220426A and GRB 230812B, challenging single-zone emission models and supporting multi-zone prompt emission.
citing papers explorer
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Fireballs' Whispers of Their Central Engine: Relativistic Filtering of Afterglow QPOs
Relativistic propagation in GRB afterglows filters intrinsic QPOs via equal-arrival-time integration, acting as a stationary low-pass filter for constant Gamma and a time-dependent filter causing frequency drift during deceleration.
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Are Single-Zone Emission models Sufficient to Explain GRB 220426A and GRB 230812B?
Spectral width increases with time in GRB 220426A and GRB 230812B, challenging single-zone emission models and supporting multi-zone prompt emission.