### Abstract

*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 <0.65 and a secondary spin estimate <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.

Language | English |
---|---|

Article number | 041014 |

Number of pages | 19 |

Journal | Physical Review X |

Volume | 6 |

Issue number | 4 |

DOIs | |

Publication status | Published - 21 Oct 2016 |

### Fingerprint

### Keywords

- LIGO
- gravitational wave detection
- GW150914
- effective-one-body
- EOB
- binary black holes
- spin waveform model
- gravitation

### Cite this

*Physical Review X*,

*6*(4), [041014]. https://doi.org/10.1103/PhysRevX.6.041014

}

*Physical Review X*, vol. 6, no. 4, 041014. https://doi.org/10.1103/PhysRevX.6.041014

**Improved analysis of GW150914 using a fully spin-precessing waveform model.** / LIGO Scientific Collaboration; Virgo Collaboration.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Improved analysis of GW150914 using a fully spin-precessing waveform model

AU - Abbott, B. P.

AU - Jawahar, S.

AU - Lockerbie, N. A.

AU - Tokmakov, K. V.

AU - LIGO Scientific Collaboration

AU - Virgo Collaboration

PY - 2016/10/21

Y1 - 2016/10/21

N2 - 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 <0.65 and a secondary spin estimate <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.

AB - 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 <0.65 and a secondary spin estimate <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.

KW - LIGO

KW - gravitational wave detection

KW - GW150914

KW - effective-one-body

KW - EOB

KW - binary black holes

KW - spin waveform model

KW - gravitation

U2 - 10.1103/PhysRevX.6.041014

DO - 10.1103/PhysRevX.6.041014

M3 - Article

VL - 6

JO - Physical Review X

T2 - Physical Review X

JF - Physical Review X

SN - 2160-3308

IS - 4

M1 - 041014

ER -