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- W3128082204 abstract "Abstract We investigate three-point statistics in weak lensing convergence, through the integrated bispectrum. This statistic involves measuring power spectra in patches, and is thus easy to measure, and avoids the complexity of estimating the very large number of possible bispectrum configurations. The integrated bispectrum principally probes the squeezed limit of the bispectrum. To be useful as a set of summary statistics, accurate theoretical predictions of the signal are required, and, assuming Gaussian sampling distributions, the covariance matrix. In this paper, we investigate through simulations how accurate are theoretical formulae for both the integrated bispectrum and its covariance, finding that there a small inaccuracies in the theoretical signal, and more serious deviations in the covariance matrix, which may need to be estimated using simulations." @default.
- W3128082204 created "2021-02-15" @default.
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- W3128082204 date "2021-06-01" @default.
- W3128082204 modified "2023-09-25" @default.
- W3128082204 title "The integrated angular bispectrum of weak lensing" @default.
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- W3128082204 doi "https://doi.org/10.1088/1475-7516/2021/06/055" @default.
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