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

(LIGO Scientific Collaboration and Virgo Collaboration)

Research output: Contribution to journalArticle

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%=4.0×10-25, 8.3×10-25, and 3.0×10-25 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.

Original languageEnglish
JournalPhysical Review D
Volume95
Issue number12
DOIs
StatePublished - 15 Jun 2017

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