Constraining GRB Emission Physics with Extensive Early-Time, Multiband Follow-up

Understand

Understanding the origin and diversity of emission processes responsible for Gamma-ray Bursts (GRBs) remains a pressing challenge.

• While prompt and contemporaneous panchromatic observations have the potential to test predictions of the internal-external shock model, extensive multiband imaging has been conducted for only a few GRBs.
• We present rich, early-time, multiband datasets for two \swift\ events, GRB 110205A and GRB 110213A.
• The former shows optical emission since the early stages of the prompt phase, followed by the steep rising in flux up to ~1000s after the burst ($t^{-\alpha}$ with $\alpha=-6.13 \pm 0.75$).