The BPT diagrams for each spaxel covered by Galaxy ﹩{ \mathcal A }﹩ (red) and ﹩{ \mathcal B }﹩ (blue), where the size of the point represents the S/N of that measurement and the shading reflects the distance from the center of the galaxy. The gray points represent the measurements from the MPA-JHU SDSS DR7 galaxies for comparison, and the upward and downward pointing triangles with error bars represent the measurements from the integrated spectra for Galaxy ﹩{ \mathcal A }﹩ and ﹩{ \mathcal B }﹩ (filled) and the best fit to the gas emission lines from that spectrum (hollow), respectively. The shock-ionization model grids of Allen et al. (2008) are overlaid for reference, showing the predicted line ratios for shocks with velocities of 200–1000 km s⁻¹ (horizontal lines), magnetic fields of strengths 0.5, 1, 2, 4, 5, and 10 μG (vertical lines), and for solar abundances from Dopita et al. (2005).