68% (inner) and 95% (outer) 2D confidence regions and 1D posteriors for w₀w_aCDM with marginalisation over galaxy biases for the Fisher analysis, with contributions from standard terms (dashed) or standard terms plus lensing magnification (solid). Dashed lack lines denote the fiducial values. For corresponding values of the constraints and shift, refer to Table 4. The label “no magn” refers to an analysis that does not include magnification in the model despite the effect being present in the data. The label “w/magn” incorporates magnification both in the model and in the data.