Exploring the Model Dependence of Electromagnetic Signals in Circumbinary Disk Simulations

In this talk, we will present our latest results on 3-d GRMHD simulations of accreting binary black holes during the post-Newtonian inspiral phase of their evolution. The goal of our work is to explore whether these systems provide a unique means to identify and characterize them with electromagnetic observations. We will present results that show how our predicted light curves vary with respect to mass ratio, binary separation, amount of accreting magnetic flux, and the order of accuracy in the post-Newtonian approximation.