Resulting S/N map of β Pictoris according to two different image processing methods applied on the reduced data. Left: S/N map obtained from ANDROMEDA, using a least-squares optimization for the ADI subtraction. Middle: S/N map obtained from ANDROMEDA, using a L1-affine optimization for the ADI subtraction. The residuals are slightly lower, mostly close to the central part, as explained in Sect. 2.2.1. Right: S/N map obtained with the PCA-KLIP algorithm (see text). All images are linearly scaled. No signal is found above the 5σ threshold in any of the maps, except for the companion β Pictoris b.