Document Type
Article
Publication Date
10-16-2017
Abstract
On August 17, 2017 at 12-41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0×104 years. We infer the component masses of the binary to be between 0.86 and 2.26 M, in agreement with masses of known neutron stars. Restricting the component spins to the range inferred in binary neutron stars, we find the component masses to be in the range 1.17-1.60 M, with the total mass of the system 2.74-0.01+0.04M. The source was localized within a sky region of 28 deg2 (90% probability) and had a luminosity distance of 40-14+8 Mpc, the closest and most precisely localized gravitational-wave signal yet. The association with the γ-ray burst GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short γ-ray bursts. Subsequent identification of transient counterparts across the electromagnetic spectrum in the same location further supports the interpretation of this event as a neutron star merger. This unprecedented joint gravitational and electromagnetic observation provides insight into astrophysics, dense matter, gravitation, and cosmology.
Recommended Citation
Abbott, Benjamin P., Rich Abbott, TDea Abbott, Fausto Acernese, Kendall Ackley, Carl Adams, Thomas Adams et al. "GW170817: observation of gravitational waves from a binary neutron star inspiral." Physical review letters 119, no. 16 (2017): 161101. http://doi.org/10.1103/PhysRevLett.119.161101
Publication Title
Physical Review Letters
DOI
10.1103/PhysRevLett.119.161101
Comments
© Physical Review Letters. Original version available at: http://doi.org/10.1103/PhysRevLett.119.161101