Top: eclipse depth in ppt as a function of wavelength. The blue data point indicates our brightness temperature measurement, while the red circles show literature values. The gray area shows 1σ contour of WASP-33 b’s equilibrium temperature. Green continuous line corresponds to Deming et al. (2012)’s carbon-rich non-inverted model, while pink continuous line indicates a solar composition model with an inverted temperature structure. Squares mark the planetary fluxes integrated over the bandpasses. Bottom: the same data after multiplication by the PHOENIX stellar model revealing the SED for WASP-33 b. Overplotted are the expected SEDs for a zero-albedo instantly re-radiation (orange diamonds, f = 2/3) and instantly redistribution (cyan triangles, f = 1/4) day-sides.