Separating the astrophysical signal from systematic errors. The different panels depict: top: an original, normalized and airmass corrected time series, middle: signal reconstructed using the first PC, bottom: signal reconstructed using the second PC. In the bottom panel, we show using a black dashed line the secondary eclipse lightcurve overplotted on the reconstructed data. The singular value decomposition of a set of time series at different wavelengths allows us to extract the exoplanet signature, largely free of systematic errors. We show the data at the original, unbinned time sampling.