Improved analysis of GW150914 using a fully spin-precessing waveform model
Creators: name: Abbott, B. P.
name: Abbott, R.
name: Abbott, T. D.
name: Abernathy, M. R.
name: Acernese, F.
name: Ackley, K.
name: Adams, C.
name: Adams, T.
name: Addesso, P.
name: Adhikari, R. X.
name: Adya, V. B.
name: Affeldt, C.
name: Agathos, M.
name: Agatsuma, K.
name: Aggarwal, N.
name: Aguiar, O. D.
name: Aiello, L.
name: Ain, A.
name: Ajith, P.
name: Allen, B.
name: Allocca, A.
name: Altin, P. A.
name: Anderson, S. B.
name: Anderson, W. G.
name: Arai, K.
name: Araya, M. C.
name: Arceneaux, C. C.
name: Areeda, J. S.
name: Arnaud, N.
name: Arun, K. G.
name: Ascenzi, S.
name: Ashton, G.
name: Ast, M.
name: Aston, S. M.
name: Astone, P.
name: Aufmuth, P.
name: Aulbert, C.
name: Babak, S.
name: Bacon, P.
name: Bader, M. K.M.
name: Baker, P. T.
name: Baldaccini, F.
name: Ballardin, G.
name: Ballmer, S. W.
name: Barayoga, J. C.
name: Barclay, S. E.
name: Barish, B. C.
name: Barker, D.
name: Barone, F.
name: Barr, B.
name: Barsotti, L.
name: Barsuglia, M.
name: Barta, D.
name: Bartlett, J.
name: Bartos, I.
name: Bassiri, R.
name: Basti, A.
name: Batch, J. C.
name: Baune, C.
name: Bavigadda, V.
name: Bazzan, M.
name: Bejger, M.
name: Bell, A. S.
name: Berger, B. K.
name: Bergmann, G.
name: Berry, C. P.L.
name: Bersanetti, D.
name: Bertolini, A.
name: Betzwieser, J.
name: Bhagwat, S.
name: Bhandare, R.
name: Bilenko, I. A.
name: Billingsley, G.
name: Birch, J.
name: Birney, R.
name: Birnholtz, O.
name: Biscans, S.
name: Bisht, A.
name: Bitossi, M.
name: Biwer, C.
name: Bizouard, M. A.
name: Blackburn, J. K.
name: Blair, C. D.
name: Blair, D. G.
name: Blair, R. M.
name: Bloemen, S.
name: Bock, O.
name: Boer, M.
name: Bogaert, G.
name: Bogan, C.
name: Bohe, A.
name: Bond, C.
name: Bondu, F.
name: Bonnand, R.
name: Boom, B. A.
name: Bork, R.
name: Boschi, V.
name: Bose, S.
name: Bouffanais, Y.
name: Bozzi, A.
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name: Braginsky, V. B.
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name: Brau, J. E.
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Publisher: name: Swinburne
Year: 2024

description: This paper presents updated estimates of source parameters for GW150914, a binary black-hole coalescence event detected by the Laser Interferometer Gravitational-wave Observatory (LIGO) in 2015 [Abbott et al. Phys. Rev. Lett. 116, 061102 (2016).]. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] presented parameter estimation of the source using a 13-dimensional, phenomenological precessing-spin model (precessing IMRPhenom) and an 11-dimensional nonprecessing effective-one-body (EOB) model calibrated to numerical-relativity simulations, which forces spin alignment (nonprecessing EOBNR). Here, we present new results that include a 15-dimensional precessing-spin waveform model (precessing EOBNR) developed within the EOB formalism. We find good agreement with the parameters estimated previously [Abbott et al. Phys. Rev. Lett. 116, 241102 (2016).], and we quote updated component masses of 35+5−3 M⊙ and 30+3−4 M⊙ (where errors correspond to 90% symmetric credible intervals). We also present slightly tighter constraints on the dimensionless spin magnitudes of the two black holes, with a primary spin estimate &lt;0.65 and a secondary spin estimate &lt;0.75 at 90% probability. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] estimated the systematic parameter-extraction errors due to waveform-model uncertainty by combining the posterior probability densities of precessing IMRPhenom and nonprecessing EOBNR. Here, we find that the two precessing-spin models are in closer agreement, suggesting that these systematic errors are smaller than previously quoted.