Evidence for energy injection and a fine-tuned central engine at optical wavelengths in GRB 070419A

A. Melandri, C. Guidorzi, S. Kobayashi +13

We present a comprehensive multiwavelength temporal and spectral analysis of the FRED GRB 070419A. The early-time emission in the $\gamma$-ray and X-ray bands can be explained by a cent…