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Fig. 3.


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Projected 1σ and 2σ 2-parameter uncertainty contours for Euclid under a ΛCDM cosmology, with and without correcting for the source-lens clustering, magnification bias, source obscuration, and local Universe terms. These are predicted using the Fisher matrix formalism, using the cosmology specified in Table 3, in the case where ΩK = 0 and is kept fixed. The true location of the constraints is denoted by the blue-dashed contours, while the biased locations if the corrections are not made are given by the solid-gold contours. Significant biases are predicted for Ωm, Ωb, h, and σ8, and their values can be found in Table 5

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