Measurement of the Optical-IR Spectral Shape of Prompt Gamma-Ray Burst Emission: A Timely Call to Action for Gamma-Ray Burst Science

Gamma-ray burst (GRB) spectra appear the same in gamma bands for different emission mechanisms. The optical-IR (OIR) spectra are different, however, allowing a clear test of synchrotron mechanisms. We argue that multi-channel OIR instruments should therefore be added to GRB-capable missions to do this important, undervalued science.