Top panel: the LRIS spectrum of RXJ1131−1231 (black line) with a model generated from nine INDO-US templates and a fifth-order continuum overplotted (red line, with green showing the continuum). The gray shaded areas were not included in the fit. Bottom panel: the residuals of the model fit. From the spectrum and model, we measure a central velocity dispersion of σ = 323 ± 20 km s ⁻¹, including systematic uncertainties.