Table 3.
Primary parameter constraints from our fiducial analysis, based on the KiDS-1000-v2 catalogue, as determined using the POLYCHORD sampling code.
Parameter | MAP and PJ-HPD | Marginal |
|
---|---|---|---|
Mean | Maximum | ||
S8 |
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Ωm |
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σ8 |
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AIA |
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Notes. Our headline results, based on the MAP and PJ-HPD statistics, include additional uncertainties that account for systematic uncertainties within the shear calibration. These uncertainties, originating from minor deviations from realism in the image simulations and the shear measurement algorithm’s sensitivity to the morphology of the galaxy sample, are estimated using a forward modelling approach (as detailed in Sect. 5.2). On the other hand, the statistical uncertainties within the shear calibration, determined by the simulation volume, are folded into the main uncertainties through their inclusion in the covariance matrix used for the cosmological inference. The mean-marginal is determined through postprocess within COSMOSIS using the default settings (Zuntz et al. 2015); while the max-marginal is calculated using the ChainConsumer with the settings of statistics = “max” and kde = 1.0 (Hinton 2016). The indicated uncertainties correspond to the 68% credible intervals.
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