A NEW METHOD FOR MEASURING WEAK GRAVITATIONAL LENSING SHEAR USING HIGHER ORDER SPIN-2 HOLICs

We investigate the possibility of using higher order moments of gravitational lensed images in the weak-lensing analysis. For this purpose, we employ spin-2 component of HOLICs (Higher Order Lensing Image's Characteristics) developed by us. We test the weak-lensing analysis with spin-2 HOLICs using actual, ground-based Subaru observations of the massive galaxy cluster A1689 (z = 0.183). It turns out that spin-2 HOLICs of order up to 8 are sufficiently applicable for weak-lensing analysis after correcting point-spread function (PSF) anisotropy as well as isotropic PSF smearing.