Shape Measurement on Simulated Roman Images

Precise galaxy shape measurements are necessary for measuring the mass distribution in the Universe, and hence understanding the matter content and clustering amplitude of the Universe. We investigate the performance of the state-of-the-art shear calibration framework using simulated imaging data for the Nancy Grace Roman Space Telescope (Roman) reference High-Latitude Imaging Survey (HLIS). The weak lensing program of the Roman mission requires the mean weak lensing shear estimate to be calibrated within about 0.03%. In this work, we build on the Roman HLIS image simulation pipeline in Troxel et al. 2021 to incorporate several new realistic processing-pipeline updates necessary to more accurately process the imaging data and calibrate the shear.