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Fast estimation of aperture-mass statistics - II. detectability of higher order statistics in current and future surveys
Version 2 2023-06-12, 08:10
Version 1 2023-06-10, 01:32
journal contribution
posted on 2023-06-12, 08:10 authored by Lucas Porth, Robert E SmithRobert E SmithWe explore an alternative method to the usual shear correlation function approach for the estimation of aperture mass statistics in weak-lensing survey data. Our approach builds on the direct estimator method. In this paper, we extend our analysis to statistics of arbitrary order and to the multiscale aperture mass statistics. We show that there always exists a linear order algorithm to retrieve any of these generalized aperture mass statistics from shape catalogues when the direct estimator approach is adopted. We validate our approach through application to a large number of Gaussian mock-lensing surveys where the true answer is known and we do this up to 10th-order statistics. We then apply our estimators to an ensemble of real-world mock catalogues obtained from N-body simulations – the SLICS mocks, and show that one can expect to retrieve detections of higher order clustering up to fourth order in a KiDS-1000 like survey. We expect that these methods will be of most utility for future wide-field surveys like Euclid and the Rubin Telescope.
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Publication status
- Published
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- Published version
Journal
Monthly Notices of the Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
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3Volume
508Page range
3474-3494Department affiliated with
- Physics and Astronomy Publications
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- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2021-10-28First Open Access (FOA) Date
2021-10-28First Compliant Deposit (FCD) Date
2021-10-27Usage metrics
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