Gamma-ray Burst Optical Afterglow

L. Li, L. Xie, J.-W. Yang, J. Li, X.-G. Wang, E.-W. Liang & WK. Zheng
Regardless of the progenitor and central engine, the gammaray burst (GRB) afterglows are produced by the synchrotron emission external forward shock. Swift and the groundbased telescopes provide a rich early afterglow data which revealed many unexpected and interesting features. Based on the statistics of a large GRB sample, this paper gives a brief introduction of the GRB optical afterglow, including observations, emission components and the afterglow puzzle achromatic or chromatic. The afterglows provide a very...
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