S/N of β Pictoris b as a function of the number of principal components used. The solid black line corresponds to the S/N from the data reduction presented in Stolker et al. (2019). The thin solid lines correspond to the full dataset, while the thick solid lines correspond to the same frames used in Stolker et al. (2019) (matched dataset), but both with our different centering options (depending on the panel). Left panel: frames are processed using the star position as the reference center for the full analysis. Middle panel: results when using the AGPM position for the principal component analysis and the star position for the derotation and stacking of the frames. Right panel: center is located at the position of the AGPM for the full analysis.