A numerical study of observational systematic errors in lensing analysis of CMB polarization

Impacts of observational systematic errors on the lensing analysis of the cosmic microwave background (CMB) polarization are investigated by numerical simulations. We model errors of gain, angle, and pointing in observation of the CMB polarization and simulate polarization fields modulated by the errors. We discuss about response of systematics induced B-modes to amplitude and spatial scale of the imposed errors and show that results of the lensing reconstruction and delensing analysis behave accordingly to it. It is observed that error levels expected in the near future lead to no significant degradation in delensing efficiency.