Effects of tapering gravitational wave templates during the ringdown phase of gravitational wave signal from binary black hole mergers

My current research focuses on studying the effects of tapering gravitational wave templates during the ringdown phase of gravitational wave signal from binary black hole mergers. This phase is crucial for probing the properties of remnant black hole and testing no-hair and final state conjectures. My project investigates how the artifacts from Fourier transform bias the estimation of signal-to-noise ratio. We analyze waveforms from both surrogate model and perturbation theory by using different Planck windows to evaluate their effect on the signal-to-noise ratio. We also study the correlations between the ringdown and late-inspiral stages of the waveform. The main aim of this work is to improve the accuracy of ringdown studies.