Leftpanel: Haynes et al. (2015) pressure-temperature profile with inversion (solid line) and calculated mean molecular weight profile (dashed line) used to model the TiO emission spectrum of WASP-33b. Right panel: example TiO emission spectrum for WASP-33b assuming a constant . The planet-to-stellar-continuum flux ratio is plotted (solid line). The dashed lines show the blackbody-to-stellar-continuum flux ratio for the minimum (2700 K) and maximum (3700 K) temperatures of the Haynes et al. (2015) pressure-temperature profile.