Papers › 3-OGC: Catalog of gravitational waves from compact-binary mergers
3-OGC: Catalog of gravitational waves from compact-binary mergers
Alexander H. Nitz, Collin D. Capano, Sumit Kumar, Yi-Fan Wang, Shilpa Kastha, Marlin Schäfer, Rahul Dhurkunde, Miriam Cabero
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We present the third Open Gravitational-wave Catalog (3-OGC) of compact-binary coalescences, based on the analysis of the public LIGO and Virgo data from 2015 through 2019 (O1, O2, O3a). Our updated catalog includes a population of 57 observations, including four binary black hole mergers that had not previously been reported. This consists of 55 binary black hole mergers and the two binary neutron star mergers GW170817 and GW190425. We find no additional significant binary neutron star or neutron star--black hole merger events. The most confident new detection is the binary black hole merger GW190925_232845 which was observed by the LIGO Hanford and Virgo observatories with 𝒫ₐₛₜᵣₒ > 0.99; its primary and secondary component masses are 20.2^(+3.9)_(-2.5) M_⊙ and 15.6^(+2.1)_(-2.6) M_⊙, respectively. We estimate the parameters of all binary black hole events using an up-to-date waveform model that includes both sub-dominant harmonics and precession effects. To enable deep follow-up as our understanding of the underlying populations evolves, we make available our comprehensive catalog of events, including the sub-threshold population of candidates, and the posterior samples of our source parameter estimates.
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