Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model
journal contributionposted on 2023-05-21, 11:24 authored by Abbott, BP, Abbott, R, Karelle SiellezKarelle Siellez, Zweizig, J, Suvorova, S, Moran, W, Evans, RJ
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, h95%0 = 4.0 x 10−25, 8.3 x 10−25, and 3.0 x 10−25 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.
Publication titlePhysical Review D: covering particles, fields, gravitation, and cosmology
Department/SchoolSchool of Natural Sciences
PublisherAmerican Physical Society
Place of publicationUnited States
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