Focal-plane images and 1σ raw contrast curves pre- and post-correction during on-sky observations. (a) pre- and (b) post-correction images for the nominal SCExAO system. (c) 1σ raw contrast curves for the correction of the nominal system. The horizontal dashed line denotes the read noise level. (d) pre- and (e) post-correction images for an additional wavefront error of 150 nm rms. (f) 1σ raw contrast curves for the correction of the system with the additional 150 nm rms wavefront error, with again the horizontal dashed line denoting the read noise.