GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

B. P. Abbott,Richard J. Abbott,T. D. Abbott,Fausto Acernese,K. Ackley,C. Adams,Todd Adams,Paolo Addesso,Rana X. Adhikari,V. B. Adya,C. Affeldt,M. Afrough,B. Agarwal,M. Agathos,Kazuhiro Agatsuma,Nancy Aggarwal,Odylio D. Aguiar,Lloyd Paul Aiello,A. Ain,P. Ajith,Bruce Allen,Gabrielle Allen,A. Allocca,Paul Altin,Anthony A. Amato,A. Ananyeva,S.B. Anderson,W. G. Anderson,S. V. Angelova,S. Antier,S. Appert,Koji Arai,M. C. Araya,J. S. Areeda,N. Arnaud,K. G. Arun,S. Ascenzi,Gregory Ashton,M. Ast,S. M. Aston,P. Astone,D. V. Atallah,Peter Aufmuth,C. Aulbert,K. AultONeal,C. Austin,A. Avila-Alvarez,Stanislav Babak,P. Bacon,M.K.M. Bader,S. Bae,Matthew Bailes,P. T. Baker,F. Baldaccini,G. Ballardin,Stefan Ballmer,S. Banagiri,J. C. Barayoga,S. E. Barclay,Barry C. Barish,D. Barker,Kevin Barkett,Fabrizio Barone,B. W. Barr,Lisa Barsotti,M. Barsuglia,D. Barta,Scott D. Barthelmy,J. Bartlett,Imre Bartos,R. Bassiri,A. Basti,J. C. Batch,M. Bawaj,J. C. Bayley,Marco Bazzan,B. Bécsy,Christian Beer,M. Bejger,I. Belahcene,A. S. Bell,Beverly K. Berger,G. Bergmann,Sebastiano Bernuzzi,J. J. Bero,Christopher P. L. Berry,D. Bersanetti,Alessandro Bertolini,J. Betzwieser,Swetha Bhagwat,R. Bhandare,I. A. Bilenko,G. Billingsley,C. R. Billman,J. Birch,R. Birney,Ofek Birnholtz,Sebastien Biscans,S. Biscoveanu,A. Bisht,M. Bitossi,Christopher M. Biwer,M. A. Bizouard,J. K. Blackburn,J. Blackman,Carl Blair,David Blair,R. M. Blair,Steven Bloemen,O. Bock,N. Bode,Michel Boër,G. Bogaert,A. Bohe,François Bondu,E. Bonilla,R. Bonnand,B.A. Boom,R. Bork,V. Boschi,Suvadeep Bose,K. Bossie,Yann Bouffanais,A Bozzi,C. Bradaschia,P. R. Brady,M. Branchesi,James Brau,Tristan Briant,A. Brillet,M. Brinkmann,V. Brisson,P. Brockill,J. E. Broida,A. F. Brooks,D. A. Brown,D. D. Brown,S. Brunett,C. C. Buchanan,Aaron Buikema,Tomasz Bulik,H. J. Bulten,Alessandra Buonanno,D. Buskulic,C. Buy,Robert L. Byer,M. Cabero,L. Cadonati,Gianpietro Cagnoli,C. Cahillane,J. Calderón Bustillo,T. A. 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Costa,Michael W. Coughlin,Scott Coughlin,J.-P. Coulon,Stefan Countryman,P. Couvares,P. B. Covas,E. E. Cowan,David Coward,M. J. Cowart,D. C. Coyne,R. Coyne,J. D. E. Creighton,T. D. Creighton,J. Cripe,S. G. Crowder,T. J. Cullen,A. Cumming,L. Cunningham,E. Cuoco,T. Dal Canton,G. Dálya,S. L. Danilishin,S. D'antonio,Karsten Danzmann,Anirban Dasgupta,C F Da Silva-Costa,V. Dattilo,I Dave,M.Davier,D. S. Davis,E. J. Daw,B. Day,Soumi De,D. B. DeBra,J. Degallaix,M. De Laurentis,Samuel Deléglise,W Del Pozzo,Nicholas Demos,T. Denker,T. Dent,R. De Pietri,Vladimir Dergachev,R. De Rosa,R T DeRosa,C. de Rossi,R. DeSalvo,O. de Varona,J. Devenson,S. Dhurandhar,M.C. Diaz,Tim Dietrich,L. di Fiore,M. Di Giovanni,T. Di Girolamo,A Di Lieto,S. Di Pace,I. Di Palma,F. Di Renzo,Z. Doctor,Vincent Dolique,Frederick J. Donovan,K. L. Dooley,S. Doravari,I. Dorrington,R Douglas,M. Dovale Álvarez,T. P. Downes,M. Drago,C. Dreissigacker,J. C. Driggers,Zhihui Du,M. Ducrot,Reetika Dudi,P. Dupej,S. E. Dwyer,T. B. Edo,M. C. 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GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

2017

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 8.0×10^4 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^(+0.04)_(−0.01)M⊙. The source was localized within a sky region of 28 deg^2(90% probability) and had a luminosity distance of 40^(+8)_(−14) 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.

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