Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model

B. P. Abbott et al. (LIGO Scientific Collaboration and Virgo Collaboration)
Phys. Rev. D 95, 122003 – Published 27 June 2017; Erratum Phys. Rev. D 104, 129901 (2021)

Abstract

Results are presented from a semicoherent search for continuous gravitational waves from the brightest low-mass X-ray binary, Scorpius X-1, using data collected during the first Advanced LIGO observing run. The search combines a frequency domain matched filter (Bessel-weighted F-statistic) with a hidden Markov model to track wandering of the neutron star spin frequency. No evidence of gravitational waves is found in the frequency range 60–650 Hz. Frequentist 95% confidence strain upper limits, h095%=4.0×1025, 8.3×1025, and 3.0×1025 for electromagnetically restricted source orientation, unknown polarization, and circular polarization, respectively, are reported at 106 Hz. They are 10 times higher than the theoretical torque-balance limit at 106 Hz.

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  • Received 12 April 2017

DOI:https://doi.org/10.1103/PhysRevD.95.122003

© 2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Gravitation, Cosmology & Astrophysics

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Vol. 95, Iss. 12 — 15 June 2017

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