Numerical study For comparable mass binary systems,the inspiral phase could be well modeled by post-Newtonian(PN)theory and numerical relativity. 口卡4三色至习QC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Numerical study For comparable mass binary systems, the inspiral phase could be well modeled by post-Newtonian(PN) theory and numerical relativity. For EMRIs (q ∼ 10 −6 ), BH perturbation theory (Teukolsky formalism) For IMRACs, not very clear! A hybrid approach, PN + Teukolsky formalism Kludge waveform model Babak et.al. 2006, Huerta et.al. 2008... However, the kludge waveform model is developed to compute waveform templates rapidly, without a high precision Analytic study?