Correction of the brighter-fatter effect on the CCDs of Hyper Suprime-Cam

Open Access

Fig. 23

Change of the PSF ellipticity e_PSF = (M_XX − M_YY)/T_PSF between an average PSF star and a faint object, as a function of T_PSF/2. The top plot refers to the raw data, the bottom one to the data corrected by model 2 with the shortened drift paths in y band. We assume that an average PSF star peaks at 1/3 of the saturation.

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