Spectroscopic analysis of the extinction-corrected Keck spectrum. Panel (a) displays the local continuum fit. We fit the local continuum around the broad Hβ and broad Hα line regions using a power law plus host-galaxy template. Panel (b) shows the local continuum-subtracted Hβ line region. The best-fitting model consists of red- and blueshifted broad Gaussians to fit the broad Hβ emission profile, as well as Gaussian profiles fit to the narrow [O III]λλ4959,5007 doublet, including two blueshifted components for each line. The narrow gray Gaussian profile coincides with [Fe VII]λ4893 emission, but this identification is tentative (see text for details). Panel (c) shows the local continuum-subtracted Hα line region. The best-fitting model includes red- and blueshifted broad Gaussians to fit the broad Hα profile, as with Hβ. There are also narrow Gaussian profiles fit to the [N II]λλ6548,6584 and [S II]λλ6716,6731 doublets, as well as to narrow Hα.