A multipole-based estimator makes shear 4PCF measurements feasible on survey data and yields a significant detection of fourth-order aperture-mass statistics in DES Y3.
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Towards an application of fourth-order shear statistics II: Efficient estimation of fourth-order shear correlation functions and an application to the DES Y3 data
A multipole-based estimator makes shear 4PCF measurements feasible on survey data and yields a significant detection of fourth-order aperture-mass statistics in DES Y3.