1D and 2D marginal posteriors for CFIS-P3 using the ideal or conservative model. The 2D inner and outer contours show the 68% and 95.5% credible region, respectively. The ideal one (blue) is obtained with global calibration, no baryonic correction, no intrinsic alignment, no boost factor, and on −2 < S/N < 6. The conservative model (red) is obtained with local calibration on 1 deg², with residual bias, modeled under the fiducial baryonic correction, and on −2 < S/N < 3. Both models are computed at . The 2D contours show the 95.5%, and the 1D filled area corresponds to the constraints within the 1 sigma confidence level. Ω_m shifts by +0.008, which corresponds to +0.2σ between the reference (blue) and the fiducial model (red).