Enlarged view of the center of Fig. 3. The data point corresponding to NGC 1404 is indicated. The three dashed lines show the predicted ﹩\mathrm{log}\,\,( L^{s}_{\mathrm{X}\,}/L_{B}) ﹩ and ﹩\mathrm{log}\,\,( L^{h}_{\mathrm{X}\,}/L_{B}) ﹩ values for Raymond‐Smith models with temperatures of 0.8, 0.4, and 0.6 keV (top to bottom) and abundances that vary along each curve from 10% of solar (left) to 50% of solar (right). The models assume a constant ratio of the volume emission measure of the gas to the optical luminosity.