Optical and Long-Wavelength Afterglow from Gamma-Ray Bursts

  title={Optical and Long-Wavelength Afterglow from Gamma-Ray Bursts},
  author={P{\'e}ter M{\'e}sz{\'a}ros and Martin J. Rees},
  journal={The Astrophysical Journal},
  pages={232 - 237}
We discuss the evolution of cosmological gamma-ray burst remnants, consisting of the cooling and expanding fireball ejecta together with any swept-up external matter, after the gamma-ray event. We show that significant optical emission is predicted, which should be measurable for timescales of hours after the event, and in some cases radio emission may be expected days to weeks after the event. The flux at optical, X-ray, and other long wavelengths decays as a power of time, and the initial… 

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ABSTRACT /7: Gamma-ray burst statistics are best explained by a source population at cosmological distances, while spec-troscopy and intensity histories of some individual bursts imply an origin on