ausblenden:
Schlagwörter:
Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,General Relativity and Quantum Cosmology, gr-qc
Zusammenfassung:
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 $49.1^{+16.4}_{-12.0}~M_{\odot}$ and
$31.6^{+12.0}_{-11.6}~M_{\odot}$; its redshift of $0.84^{+0.4}_{-0.35}$ ($90\%$
credible interval) may make it the most distant merger so far. 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.
