Reconstructing the sky location of gravitational-wave detected compact binary systems

Methodology for testing and comparison

T. Sidery, B. Aylott, N. Christensen, B. Farr, W. Farr, F. Feroz, J. Gair, K. Grover, P. Graff, C. Hanna, V. Kalogera, I. Mandel, R. O'Shaughnessy, M. Pitkin, L. Price, V. Raymond, C. Röver, L. Singer, M. Van Der Sluys, R. J.E. Smith & 3 others A. Vecchio, J. Veitch, S. Vitale

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The problem of reconstructing the sky position of compact binary coalescences detected via gravitational waves is a central one for future observations with the ground-based network of gravitational-wave laser interferometers, such as Advanced LIGO and Advanced Virgo. Different techniques for sky localization have been independently developed. They can be divided in two broad categories: fully coherent Bayesian techniques, which are high latency and aimed at in-depth studies of all the parameters of a source, including sky position, and "triangulation-based" techniques, which exploit the data products from the search stage of the analysis to provide an almost real-time approximation of the posterior probability density function of the sky location of a detection candidate. These techniques have previously been applied to data collected during the last science runs of gravitational-wave detectors operating in the so-called initial configuration. Here, we develop and analyze methods for assessing the self consistency of parameter estimation methods and carrying out fair comparisons between different algorithms, addressing issues of efficiency and optimality. These methods are general, and can be applied to parameter estimation problems other than sky localization. We apply these methods to two existing sky localization techniques representing the two above-mentioned categories, using a set of simulated inspiral-only signals from compact binary systems with a total mass of ≤20M and nonspinning components. We compare the relative advantages and costs of the two techniques and show that sky location uncertainties are on average a factor ≈20 smaller for fully coherent techniques than for the specific variant of the triangulation-based technique used during the last science runs, at the expense of a factor ≈1000 longer processing time.

Original languageEnglish
Article number084060
Number of pages11
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume89
Issue number8
DOIs
Publication statusPublished - 18 Apr 2014

Keywords

  • binary mergers
  • neutron stars
  • gravitational waves

Cite this

Sidery, T. ; Aylott, B. ; Christensen, N. ; Farr, B. ; Farr, W. ; Feroz, F. ; Gair, J. ; Grover, K. ; Graff, P. ; Hanna, C. ; Kalogera, V. ; Mandel, I. ; O'Shaughnessy, R. ; Pitkin, M. ; Price, L. ; Raymond, V. ; Röver, C. ; Singer, L. ; Van Der Sluys, M. ; Smith, R. J.E. ; Vecchio, A. ; Veitch, J. ; Vitale, S. / Reconstructing the sky location of gravitational-wave detected compact binary systems : Methodology for testing and comparison. In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 2014 ; Vol. 89, No. 8.
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abstract = "The problem of reconstructing the sky position of compact binary coalescences detected via gravitational waves is a central one for future observations with the ground-based network of gravitational-wave laser interferometers, such as Advanced LIGO and Advanced Virgo. Different techniques for sky localization have been independently developed. They can be divided in two broad categories: fully coherent Bayesian techniques, which are high latency and aimed at in-depth studies of all the parameters of a source, including sky position, and {"}triangulation-based{"} techniques, which exploit the data products from the search stage of the analysis to provide an almost real-time approximation of the posterior probability density function of the sky location of a detection candidate. These techniques have previously been applied to data collected during the last science runs of gravitational-wave detectors operating in the so-called initial configuration. Here, we develop and analyze methods for assessing the self consistency of parameter estimation methods and carrying out fair comparisons between different algorithms, addressing issues of efficiency and optimality. These methods are general, and can be applied to parameter estimation problems other than sky localization. We apply these methods to two existing sky localization techniques representing the two above-mentioned categories, using a set of simulated inspiral-only signals from compact binary systems with a total mass of ≤20M and nonspinning components. We compare the relative advantages and costs of the two techniques and show that sky location uncertainties are on average a factor ≈20 smaller for fully coherent techniques than for the specific variant of the triangulation-based technique used during the last science runs, at the expense of a factor ≈1000 longer processing time.",
keywords = "binary mergers, neutron stars, gravitational waves",
author = "T. Sidery and B. Aylott and N. Christensen and B. Farr and W. Farr and F. Feroz and J. Gair and K. Grover and P. Graff and C. Hanna and V. Kalogera and I. Mandel and R. O'Shaughnessy and M. Pitkin and L. Price and V. Raymond and C. R{\"o}ver and L. Singer and {Van Der Sluys}, M. and Smith, {R. J.E.} and A. Vecchio and J. Veitch and S. Vitale",
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Sidery, T, Aylott, B, Christensen, N, Farr, B, Farr, W, Feroz, F, Gair, J, Grover, K, Graff, P, Hanna, C, Kalogera, V, Mandel, I, O'Shaughnessy, R, Pitkin, M, Price, L, Raymond, V, Röver, C, Singer, L, Van Der Sluys, M, Smith, RJE, Vecchio, A, Veitch, J & Vitale, S 2014, 'Reconstructing the sky location of gravitational-wave detected compact binary systems: Methodology for testing and comparison', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 89, no. 8, 084060. https://doi.org/10.1103/PhysRevD.89.084060

Reconstructing the sky location of gravitational-wave detected compact binary systems : Methodology for testing and comparison. / Sidery, T.; Aylott, B.; Christensen, N.; Farr, B.; Farr, W.; Feroz, F.; Gair, J.; Grover, K.; Graff, P.; Hanna, C.; Kalogera, V.; Mandel, I.; O'Shaughnessy, R.; Pitkin, M.; Price, L.; Raymond, V.; Röver, C.; Singer, L.; Van Der Sluys, M.; Smith, R. J.E.; Vecchio, A.; Veitch, J.; Vitale, S.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 89, No. 8, 084060, 18.04.2014.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Reconstructing the sky location of gravitational-wave detected compact binary systems

T2 - Methodology for testing and comparison

AU - Sidery, T.

AU - Aylott, B.

AU - Christensen, N.

AU - Farr, B.

AU - Farr, W.

AU - Feroz, F.

AU - Gair, J.

AU - Grover, K.

AU - Graff, P.

AU - Hanna, C.

AU - Kalogera, V.

AU - Mandel, I.

AU - O'Shaughnessy, R.

AU - Pitkin, M.

AU - Price, L.

AU - Raymond, V.

AU - Röver, C.

AU - Singer, L.

AU - Van Der Sluys, M.

AU - Smith, R. J.E.

AU - Vecchio, A.

AU - Veitch, J.

AU - Vitale, S.

PY - 2014/4/18

Y1 - 2014/4/18

N2 - The problem of reconstructing the sky position of compact binary coalescences detected via gravitational waves is a central one for future observations with the ground-based network of gravitational-wave laser interferometers, such as Advanced LIGO and Advanced Virgo. Different techniques for sky localization have been independently developed. They can be divided in two broad categories: fully coherent Bayesian techniques, which are high latency and aimed at in-depth studies of all the parameters of a source, including sky position, and "triangulation-based" techniques, which exploit the data products from the search stage of the analysis to provide an almost real-time approximation of the posterior probability density function of the sky location of a detection candidate. These techniques have previously been applied to data collected during the last science runs of gravitational-wave detectors operating in the so-called initial configuration. Here, we develop and analyze methods for assessing the self consistency of parameter estimation methods and carrying out fair comparisons between different algorithms, addressing issues of efficiency and optimality. These methods are general, and can be applied to parameter estimation problems other than sky localization. We apply these methods to two existing sky localization techniques representing the two above-mentioned categories, using a set of simulated inspiral-only signals from compact binary systems with a total mass of ≤20M and nonspinning components. We compare the relative advantages and costs of the two techniques and show that sky location uncertainties are on average a factor ≈20 smaller for fully coherent techniques than for the specific variant of the triangulation-based technique used during the last science runs, at the expense of a factor ≈1000 longer processing time.

AB - The problem of reconstructing the sky position of compact binary coalescences detected via gravitational waves is a central one for future observations with the ground-based network of gravitational-wave laser interferometers, such as Advanced LIGO and Advanced Virgo. Different techniques for sky localization have been independently developed. They can be divided in two broad categories: fully coherent Bayesian techniques, which are high latency and aimed at in-depth studies of all the parameters of a source, including sky position, and "triangulation-based" techniques, which exploit the data products from the search stage of the analysis to provide an almost real-time approximation of the posterior probability density function of the sky location of a detection candidate. These techniques have previously been applied to data collected during the last science runs of gravitational-wave detectors operating in the so-called initial configuration. Here, we develop and analyze methods for assessing the self consistency of parameter estimation methods and carrying out fair comparisons between different algorithms, addressing issues of efficiency and optimality. These methods are general, and can be applied to parameter estimation problems other than sky localization. We apply these methods to two existing sky localization techniques representing the two above-mentioned categories, using a set of simulated inspiral-only signals from compact binary systems with a total mass of ≤20M and nonspinning components. We compare the relative advantages and costs of the two techniques and show that sky location uncertainties are on average a factor ≈20 smaller for fully coherent techniques than for the specific variant of the triangulation-based technique used during the last science runs, at the expense of a factor ≈1000 longer processing time.

KW - binary mergers

KW - neutron stars

KW - gravitational waves

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U2 - 10.1103/PhysRevD.89.084060

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M3 - Article

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JO - Physical Review D

JF - Physical Review D

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