Type: Talk
Session: Transient and Variable Star Science II
Author: Anupreeta More

Abstract: Gravitationally lensed kilonovae, the EM counterparts of gravitational wave (GW) sources are proposed to be promising probes of the Hubble constant. With a GW alert and an optical image of the corresponding lens system where the lensed host is visible, we can make early predictions for future appearances of the lensed counterparts. We study the uncertainties in the time delay predictions in such scenarios and assess how soon we will be able to make predictions given the typical time delays seen in galaxy-scale lenses. We also study how systematic assumptions, for example, choice of the lens mass density profile and the type of lensed image configurations can impact our ability to constrain the Hubble constant.