We present a discovery and observation of an extraordinarily bright prompt optical emission of the GRB 060117 obtained by a wide-field camera atop the robotic telescope FRAM of the Pierre Auger Observatory from 2 to 10 minutes after the GRB. We found rapid average temporal flux decay of alpha = -1.7 +/- 0.1 and a peak brightness R = 10.1 mag. We interpret the shape of the lightcurve as a transition between reverse and forward shock emission.
@article{arxiv.astro-ph/0702197,
title = {GRB 060117: Reverse + forward shock solution},
author = {Martin Jelínek and Michael Prouza and Petr Kubánek and René Hudec and Martin F. Nekola and Jan Ridky and Jiri Grygar},
journal= {arXiv preprint arXiv:astro-ph/0702197},
year = {2010}
}
Comments
2 pages, 1 figure; Proceedings of "SWIFT and GRBs: Unveiling the Relativistic Universe" June 5-9, 2006 Venice (Italy)