posted on 2024-08-06, 11:12authored byB. P. Abbott, R. Abbott, T. D. Abbott, F. Acernese, K. Ackley, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Afrough, B. Agarwal, M. Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, B. Allen, G. Allen, A. Allocca, M. A. Aloy, P. A. Altin, A. Amato, A. Ananyeva, S. B. Anderson, W. G. Anderson, S. V. Angelova, S. Antier, S. Appert, K. Arai, M. C. Araya, J. S. Areeda, N. Arnaud, K. G. Arun, S. Ascenzi, G. Ashton, M. Ast, S. M. Aston, P. Astone, D. V. Atallah, P. Aufmuth, C. Aulbert, K. Aultoneal, C. Austin, A. Avila-Alvarez, S. Babak, P. Bacon, M. K.M. Bader, S. Bae, P. T. Baker, F. Baldaccini, G. Ballardin, S. W. Ballmer, S. Banagiri, J. C. Barayoga, S. E. Barclay, B. C. Barish, D. Barker, K. Barkett, F. Barone, B. Barr, L. Barsotti, M. Barsuglia, D. Barta, J. Bartlett, I. Bartos, R. Bassiri, A. Basti, J. C. Batch, M. Bawaj, J. C. Bayley, M. Bazzan, B. Bécsy, C. Beer, M. Bejger, I. 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On 2017 August 17, the gravitational-wave event GW170817 was observed by the Advanced LIGO and Virgo detectors, and the gamma-ray burst (GRB) GRB. 170817A was observed independently by the Fermi Gamma-ray Burst Monitor, and the Anti-Coincidence Shield for the Spectrometer for the International Gamma-Ray Astrophysics Laboratory. The probability of the near-simultaneous temporal and spatial observation of GRB. 170817A and GW170817 occurring by chance is 5.0 x 10(-8). We therefore confirm binary neutron star mergers as a progenitor of short GRBs. The association of GW170817 and GRB. 170817A provides new insight into fundamental physics and the origin of short GRBs. We use the observed time delay of (+ 1.74 +/- 0.05) s between GRB. 170817A and GW170817 to: (i) constrain the difference between the speed of gravity and the speed of light to be between -3 x 10(-15) and + 7 x 10(-16) times the speed of light, (ii) place new bounds on the violation of Lorentz invariance, (iii) present a new test of the equivalence principle by constraining the Shapiro delay between gravitational and electromagnetic radiation. We also use the time delay to constrain the size and bulk Lorentz factor of the region emitting the gamma-rays. GRB. 170817A is the closest short GRB with a known distance, but is between 2 and 6 orders of magnitude less energetic than other bursts with measured redshift. A new generation of gamma-ray detectors, and subthreshold searches in existing detectors, will be essential to detect similar short bursts at greater distances. Finally, we predict a joint detection rate for the Fermi Gamma-ray Burst Monitor and the Advanced LIGO and Virgo detectors of 0.1-1.4 per year during the 2018-2019 observing run and 0.3-1.7 per year at design sensitivity.
Funding
Directorate for STEM Education
Innovation, Science and Economic Development Canada
National Institute for Nuclear Physics
National Science Center
National Natural Science Foundation of China
Dutch Research Council
French National Centre for Scientific Research
Ministry of Education
Russian Foundation for Basic Research
Hungarian Scientific Research Fund
The Kavli Foundation
Scottish Funding Council
Natural Sciences and Engineering Research Council
Russian Science Foundation
National Aeronautics and Space Administration
Australian Research Council
Leverhulme Trust
Federal Ministry for Economic Affairs and Climate Action
European Commission
National Research, Development and Innovation Office
Council of Scientific and Industrial Research
Office of the Director
Science and Technology Facilities Council
Ministry of Science and Technology of the People's Republic of China
Atomic Energy and Alternative Energies Commission
Swiss National Science Foundation
Royal Society
United States Department of Energy
Abdus Salam International Centre for Theoretical Physics
European Research Council
Department of Science and Technology
Science Foundation Ireland
Goddard Space Flight Center
University Grants Committee
Canadian Institute for Advanced Research
Ministry of Economy, Industry and Competitiveness
Generalitat Valenciana
Directorate for Mathematical & Physical Sciences
National Research Foundation of Korea
Agenzia Spaziale Italiana
Directorate for Computer & Information Science & Engineering