Temperature-pressure profiles used for HD 209458b. The solid lines are from this work, and the dashed lines are the polynomial fits of Heng et al. (2011) to the models of Iro et al. (2005). The blue lines are the night side profiles, the red lines the day side profiles (i.e. T_night and T_day, respectively) and the green line is the initial profile. The horizontal dashed line demarks the radiatively inactive and radiative regions.