Contributions to the additive systematic, , from the PH08 systematics model. The four terms from Eq. (10), shown in varying shades of blue/green (see legend for details), cause ⟨e_obse_obs⟩ to deviate from . The total systematic (red), given by the summation of these four terms, can be compared to the yellow band which encloses half the uncertainty on ξ₊, assuming a non-tomographic cosmic shear analysis. As the correlations can be negative, the vertical axis has a symlog scale with black lines indicating the transition from the logarithmic to linear scale. The apparent asymmetry of the error bars (computed via jackknife realisations) is just an artefact of them crossing the log-linear scale boundary. The PH08 systematics model (red) can be compared to the magenta curve, which shows the expected contribution to the cosmic shear signal from the detector-level bias found in 3/32 OmegaCAM CCDs (see Sect. 3.4.1). This figure presents the analysis of the fifth tomographic bin; similar results are obtained for the other bins.