In each of the above three plots, the 3.6 μm data (green points) are shown above the 4.5 μm data (blue points), which is offset in relative flux for clarity. Left: raw Spitzer data with the best-fitting trend and occultation models superimposed. Middle: the same data binned in phase (Δφ = 0.002 ≈ 6.74 min) with the best-fitting trend models superimposed. Right: the binned data after dividing by the best-fitting trend models, and with the best-fitting occultation models superimposed. The error bar on each binned measurement in the panels in the middle and on the right is the standard deviation of the points within the bin.