Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model
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 ×1 0-25, 8.3 ×1 0-25, and 3.0 ×1 0-25 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:
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Physical Review D
- Pub Date:
- June 2017
- DOI:
- 10.1103/PhysRevD.95.122003
- arXiv:
- arXiv:1704.03719
- Bibcode:
- 2017PhRvD..95l2003A
- Keywords:
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- General Relativity and Quantum Cosmology
- E-Print:
- Phys. Rev. D 95, 122003 (2017)