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We study the parameter estimation of gravitational waves for aligned-spinbinary black hole (BBH) signals and assess the impact of bias that can beproduced by using nonspinning template waveforms. We employ simple methods tocalculate the statistical uncertainty from an overlap distribution. For thefiducial waveform model, we use a phenomenological model, which is designed togenerate the gravitational waveforms emitted from merging BBH systems. We showthat the mass parameters recovered by nonspinning waveform templates can besignificantly biased from the true values of aligned-spin signals. By comparingthe systematic bias with the statistical uncertainty, we examine the validityof nonspinning templates for the parameter estimation of aligned-spin BBHs.

Systematic Bias Due to Nonspinning Template Waveforms in the Gravitational Wave Parameter Estimation for Aligned-Spin Binary Black Holes