Papers › 4-OGC: Catalog of gravitational waves from compact-binary mergers
4-OGC: Catalog of gravitational waves from compact-binary mergers
Alexander H. Nitz, Sumit Kumar, Yi-Fan Wang, Shilpa Kastha, Shichao Wu, Marlin Schäfer, Rahul Dhurkunde, Collin D. Capano
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We present the fourth Open Gravitational-wave Catalog (4-OGC) of binary neutron star (BNS), binary black hole (BBH) and neutron star-black hole (NSBH) mergers. The catalog includes observations from 2015-2020 covering the first through third observing runs (O1, O2, O3a, O3b) of Advanced LIGO and Advanced Virgo. The updated catalog includes 7 BBH mergers which were not previously reported with high significance during O3b for a total of 94 observations: 90 BBHs, 2 NSBHs, and 2 BNSs. The most confident new detection, GW200318_191337, has component masses 49.1^(+16.4)_(-12.0)M_⊙ and 31.6^(+12.0)_(-11.6)M_⊙; its redshift of 0.84^(+0.4)_(-0.35) (90% credible interval) may make it the most distant merger so far. We estimate the merger rate of BBH sources, assuming a powerlaw mass distribution containing an additive Gaussian peak, to be 16.5_(-6.2)^(+10.4) (25.0_(-8.0)^(+12.6)) Gpc⁻³ yr⁻¹ at a redshift of z=0 (0.2). For BNS and NSBH sources, we estimate a merger rate of 200⁺³⁰⁹₋₁₄₈ Gpc⁻³ yr⁻¹ and 19⁺³⁰₋₁₄ Gpc⁻³ yr⁻¹, respectively, assuming the known sources are representative of the total population. We provide reference parameter estimates for each of these sources using an up-to-date model accounting for instrumental calibration uncertainty. The corresponding data release also includes our full set of sub-threshold candidates.
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