Weak Gravitational Lensing Shear Estimation with Metacalibration for the Roman High-Latitude Imaging Survey

Understand

We investigate the performance of the Metacalibration 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%.
• To reach this goal, we can test our calibration process with various simulations and ultimately isolate the sources of residual shear biases in order to improve our methods.
• In this work, we build on the Roman HLIS image simulation pipeline in Troxel et al.