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Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,General Relativity and Quantum Cosmology, gr-qc
Abstract:
We present the second Open Gravitational-wave Catalog (2-OGC) of
compact-binary coalescences, obtained from the complete set of public data from
Advanced LIGO's first and second observing runs. For the first time we also
search public data from the Virgo observatory. Our analysis is based upon
updated methods to improve detection of compact binary mergers by incorporating
corrections for short time variations in the detectors' noise power spectral
density and instantaneous network sensitivity. We identify a population of 14
binary black hole mergers with $p_{\mathrm{astro}} > 0.5$ along with the
GW170817 binary neutron star merger. We confirm the binary black hole merger
observations of GW170121, GW170304, and GW170727. We also report GW151205, a
new marginal binary black hole merger during the first observing run. No other
individually significant binary neutron star candidates are found, nor did we
observe any significant neutron star--black hole candidates. We make available
our comprehensive catalog of events, including the sub-threshold population of
candidates to enable deeper follow-up as our understanding of the underlying
populations evolves.
