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GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole CoalescenceWe report the observation of a gravitational-wave signal produced by the coalescence of two stellar-mass black holes. The signal, GW151226, was observed by the twin detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) on December 26, 2015 at 03:38:53 UTC. The signal was initially identified within 70 s by an online matched-filter search targeting binary coalescences. Subsequent off-line analyses recovered GW151226 with a network signal-to-noise ratio of 13 and a significance greater than 5(sigma). The signal persisted in the LIGO frequency band for approximately 1 s, increasing in frequency and amplitude over about 55 cycles from 35 to 450 Hz, and reached a peak gravitational strain of 3.4(+0.7/-0.9) x 10(exp -22). The inferred source-frame initial black hole masses are 14.2(+8.3/-3.7 Stellar Mass and 7.5(+2.3/-2.3) Stellar Mass, and the final black hole mass is 20.8(+6.1/-1.7) Stellar Mass. We find that at least one of the component black holes has spin greater than 0.2. This source is located at a luminosity distance of 440(+180/-190) Mpc corresponding to a redshift of 0.090(+.030/-0.04). All uncertainties define a 90% credible interval. This second gravitational-wave observation provides improved constraints on stellar populations and on deviations from general relativity.
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Document Type
Reprint (Version printed in journal)
Abbott, B. P. (California Inst. of Tech. Pasadena, CA, United States)
Abbott, R. (California Inst. of Tech. Pasadena, CA, United States)
Abbott, T. D. (Louisiana State Univ. Baton Rouge, LA, United States)
Abernathy, M. R. (American Univ. Washington, DC, United States)
Acernese, F. (Salerno Univ. Italy)
Ackley, K. (Florida Univ. Gainesville, FL, United States)
Adams, C. (LIGO Livingston Observatory Livingston, LA, United States)
Adams, T. (Centre National de la Recherche Scientifique Annecy-le-Vieux, France)
Addesso, P. (Sannio Univ. Benevento, Italy)
Camp, Jordan B. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Adhikari, R. X. (California Inst. of Tech. Pasadena, CA, United States)
Adya, V. B. (Max-Planck-Inst. fuer Gravitationsphysik Hanover, Germany)
Affeldt, C. (Max-Planck-Inst. fuer Gravitationsphysik Hanover, Germany)
Agathos, M. (National Institute for Subatomic Physics (Nikhef) Amsterdam, Netherlands)
Agatsuma, K. (National Institute for Subatomic Physics (Nikhef) Amsterdam, Netherlands)
Aggarwal, N. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Aguiar, O. D. (Instituto de Pesquisas Espaciais Sao Jose dos Campos, Brazil)
Aiello, L. (Comitato Nazionale per l'Energia Nucleare Rome, Italy)
Ain, A. (Inter-University Centre for Astronomy and Astrophysics (IUCAA) Pune, India)
Ajith, P. (Tata Inst. of Fundamental Research Bangalore, India)
Allen, B. (Leibniz Universitaet Hannover, Germany)
Allocca, A. (Pisa Univ. Italy)
Altin, P. A. (Australian National Univ. Canberra, Australia)
Anderson, S. B. (California Inst. of Tech. Pasadena, CA, United States)
Anderson, W. G. (Wisconsin Univ. Milwaukee, WI, United States)
Date Acquired
April 17, 2017
Publication Date
June 15, 2016
Publication Information
Publication: Physical Review Letters
Volume: 116
Issue: 24
ISSN: 0031-9007
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