Fig. 3.
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GALFIT models and residuals in the six NIRCam bands using PSF, Sérsic, and combined Sérsic+PSF models. The PSF fit shows clear residuals, especially in the UV bands. The fit improves considerably with the addition of a Sérsic component. The best fit is obtained when both Sérsic and PSF components are used, with ΔBIC indicating a significant improvement in all bands (Sect. 3.1).
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