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- W2021345345 abstract "Bright optical and X-ray flares have been observed in many Gamma-ray Burst (GRB) afterglows. These flares have been attributed to late activity of the central engine. In most cases the peak energy is not known and it is possible and even likely that there is a significant far-ultraviolet component. These far-ultraviolet photons escape our detection because they are absorbed by the neutral hydrogen before reaching Earth. However, these photons cross the blast wave produced by the ejecta that have powered the initial GRB. They can be inverse Compton upscattered by hot electrons within this blast wave. This process will produce a strong sub-GeV flare that follows the high energy (soft X-ray) tail of the far-UV flare but lasts much longer and can be detected by the upcoming {em Gamma-Ray Large Area Telescope} (GLAST) satellite. This signature can be used to probe the spectrum of the underlying far-ultraviolet flare. The extra cooling produced by this inverse Compton process can lower the X-ray emissivity of the forward shock and explain the unexpected low early X-ray flux seen in many GRBs." @default.
- W2021345345 created "2016-06-24" @default.
- W2021345345 creator A5001538936 @default.
- W2021345345 creator A5009424001 @default.
- W2021345345 date "2006-07-01" @default.
- W2021345345 modified "2023-10-16" @default.
- W2021345345 title "Sub-GeV flashes in -ray burst afterglows as probes of underlying bright far-ultraviolet flares" @default.
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- W2021345345 doi "https://doi.org/10.1111/j.1745-3933.2006.00181.x" @default.
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