Journal article
Application of hidden Markov model tracking to the search for long-duration transient gravitational waves from the remnant of the binary neutron star merger GW170817
L Sun, A Melatos
Physical Review D | AMER PHYSICAL SOC | Published : 2019
Abstract
The nature of the postmerger remnant of GW170817, the first binary neutron star coalescence observed by the Advanced Laser Interferometer Gravitational Wave Observatory (Advanced LIGO) and Advanced Virgo, is unknown. Searches have been carried out for short (-1 s), intermediate (-500 s), and long (∼ days) signals using various algorithms without yielding a detection. We describe an efficient frequency tracking scheme based on a hidden Markov model to search for long-duration transient signals from a neutron star remnant with spin-down timescale in the range ∼102 s-104 s. The method was used to the search for a signal from GW170817. We validate the method and estimate its sensitivity through ..
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Grants
Awarded by National Science Foundation
Funding Acknowledgements
We are grateful to Karl Wette and Grant Meadors for their comprehensive formal review of the code and validation of the method. We are also grateful to David Keitel, the LVC postmerger analysis group, and the Continuous Wave Working Group for detailed comments and informative discussions. L. S. is a member of the LIGO Laboratory. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation, and operates under Cooperative Agreement No. PHY-0757058. Advanced LIGO was built under Grant No. PHY-0823459. L. S. was supported by an Australian Research Training Program Scholarship and the Albert Shimmins Fund at earlier stages of this project. The research is also supported by Australian Research Council (ARC) Discovery Project No. DP170103625 and the ARC Centre of Excellence for Gravitational Wave Discovery CE170100004. This paper carries LIGO Document No. LIGO-P1800291.