GWTC-1: A Gravitational-Wave Transient Catalog of Compact Binary Mergers Observed by LIGO and Virgo during the First and Second Observing Runs

Abstract

We present the results from three gravitational-wave searches for coalescing compact binaries with component masses above 1${\mathrm{M}}_{\odot }$ during the first and second observing runs of the Advanced gravitational-wave detector network. During the first observing run (O1), from September $12^{\mathrm{th}}$, 2015 to January $19^{\mathrm{th}}$, 2016, gravitational waves from three binary black hole mergers were detected. The second observing run (O2), which ran from November $30^{\mathrm{th}}$, 2016 to August $25^{\mathrm{th}}$, 2017, saw the first detection of gravitational waves from a binary neutron star inspiral, in addition to the observation of gravitational waves from a total of seven binary black hole mergers, four of which we report here for the first time: GW170729, GW170809, GW170818 and GW170823. For all significant gravitational-wave events, we provide estimates of the source properties. The detected binary black holes have total masses between $18.6_{-0.7}^{+3.2}{\mathrm{M}}_{\odot }$, and $84.4_{-11.1}^{+15.8}{\mathrm{M}}_{\odot }$, and range in distance between $320_{-110}^{+120}$ Mpc and $2840_{-1360}^{+1400}$ Mpc. No neutron star - black hole mergers were detected. In addition to highly significant gravitational-wave events, we also provide a list of marginal event candidates with an estimated false alarm rate less than 1 per 30 days. From these results over the first two observing runs, which include approximately one gravitational-wave detection per 15 days of data searched, we infer merger rates at the 90% confidence intervals of $110-3840$ ${\mathrm{Gpc}}^{-3}{\mathrm{y}}^{-1}$ for binary neutron stars and $9.7-101$ ${\mathrm{Gpc}}^{-3}{\mathrm{y}}^{-1}$ for binary black holes assuming fixed population distributions, and determine a neutron star - black hole merger rate 90% upper limit of $610$ ${\mathrm{Gpc}}^{-3}{\mathrm{y}}^{-1}$.

Total: 49 pages and 17 figures. Strain data are available from the Gravitational Wave Open Science Center at https://doi.org/10.7935/82H3-HH23. Figures, data behind the figures, including posterior samples, are available from https://dcc.ligo.org/LIGO-P1800307/public