Yost, S. A.Aharonian, F.Akerlof, C. W.Ashley, M. C. B.Barthelmy, S.Gehrels, N.Gogus, E.2025-01-272025-01-2720061594-9982https://doi.org/10.1393/ncb/i2007-10236-7https://hdl.handle.net/20.500.12428/23250Workshop on Swift and GRBs - Unveiling the Relativistic University -- JUN 05-09, 2006 -- Venice, ITALYWe discuss the diversity of prompt Gamma-Ray Burst (GRB) spectra from high to low energies, comparing optical observations to simultaneous garnma-ray emission. These events show a wide variety of relations between gamma-ray and optical spectral and temporal properties. Using optical detections and limits from ROTSE as well as the literature, we constrain the broad-band spectral shape during GRB events. With no single result for low-energy emission behavior, GRB models will need to account for diverse outcomes.eninfo:eu-repo/semantics/closedAccessGamma-Ray-BurstsGrb 990123RadiationModelsConference Object12110-111201120510.1393/ncb/i2007-10236-7Q4WOS:0002508243000262-s2.0-34548265723N/A