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J. T. Bonnell (USRA/GSFC/NASA), J. P. Norris (GSFC/NASA)
Spectral evolution timescales, as determined by energy dependent lags, have recently been found to be potentially anticorrelated with peak luminosity for long gamma-ray bursts. However, the possible physical connection between spectral lag and luminosity is unclear. We study the 4-dimensional space of duration, spectral lag, peak flux and peak in nu*F(nu), using BATSE 64-ms data for long bursts with fluxes above ~ 1 photon/cm2/s. Results may place constraints on questions regarding the dynamic vs. kinematic origin of the relationship between spectral lag and luminosity.
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