A strong optical flare before the rising afterglow of GRB 080129

@inproceedings{GreinerASO,
  title={A strong optical flare before the rising afterglow of GRB 080129},
  author={Jochen Greiner and Thomas Kr{\"u}hler and Sheila McBreen and Marco Ajello and Dimitrios Giannios and Robert Schwarz and Sandra Savaglio and A. K{\"u}pc{\"u} Yoldaş and Christoph Clemens and Alexandra Stefanescu and Gl{\`o}ria Sala and F. de Bertoldi and G. Szokoly and Sylvio Klose}
}
We report on GROND observations of a 40 sec duration (rest-frame) optical flare from GRB 080129 at redshift 4.349. The rise-and decay time follow a power law with indices +12 and-8, respectively, inconsistent with a reverse shock and a factor 10 5 faster than variability caused by ISM interaction. While optical flares have been seen in the past (e.g. GRB… CONTINUE READING