Equilibrium temperature of WASP-33b for different albedo (A) and re-radiation factors (f). Solid contours show lines of constant temperatures at 150 K intervals. Overplotted are lines of constant temperature for the measured brightness temperatures (dashed lines), labeled with the bandpass they were observed (D12 indicates the K_s-band measurement from Deming et al. (2012). The line labeled “Avg.” indicates the line for constant temperature of the effective temperature determined from the literature measurements. Vertical (dashed) lines indicate the re-radiation factors for a homogeneous day-side temperature (f = 1/2), and for an instantly re-radiating day-side (f = 2/3).