Measuring eccentricity of binary black holes in GWTC-1 by using inspiral-only waveform

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In this paper, we estimate the eccentricity of the 10 BBHs in GWTC-1 by using the inspiral-only BBH waveform template EccentricFD.

• Firstly, we test our method with simulated eccentric BBHs.
• Afterwards we apply the method to the real BBH gravitational wave data.
• We find that the BBHs in GWTC-1 except GW151226, GW170608 and GW170729 admit very small eccentricity.