Description
Third-order shear statistics, e.g. three-point correlation function of shear or mass skewness, is one of the most natural extensions of the standard two-point correlation function, and one of the few examples that has an analytic expression in terms of the underlying power spectrum (at PT regime) or bispectrum of large-scale structure. Because of its nice nature, 3pt has been studied for a long time, while its application to real data was limited until recently due to the challenges in the computational cost of measurement and theoretical prediction. In this talk, I will present a novel analysis method based on the Multipole expansion of shear 3PCF that enables the joint analysis of 2+3pt shear statistics, along with its applications to the DES and HSC data. We also present the mock analysis as a validation of the analysis method against the observational or astrophysical systematics, e.g. baryonic feedback effect or photometric redshift uncertainties.
