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 journalArticleResearchpeer-review

21 Citations (Scopus)

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
Article number122003
Number of pages20
JournalPhysical Review D
Volume95
Issue number12
DOIs
Publication statusPublished - 15 Jun 2017

Cite this

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title = "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{\%}=4.0×10-25, 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.",
author = "Ackley, {Kendall Danielle} and Lasky, {P D} and Y Levin and S Qiu and L Sammut and E Thrane and C Whittle and Xingjiang Zhu and {LIGO Scientific Collaboration and Virgo Collaboration}",
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doi = "10.1103/PhysRevD.95.122003",
language = "English",
volume = "95",
journal = "Physical Review D",
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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.

In: Physical Review D, Vol. 95, No. 12, 122003, 15.06.2017.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model

AU - Ackley, Kendall Danielle

AU - Lasky, P D

AU - Levin, Y

AU - Qiu, S

AU - Sammut, L

AU - Thrane, E

AU - Whittle, C

AU - Zhu, Xingjiang

AU - LIGO Scientific Collaboration and Virgo Collaboration

PY - 2017/6/15

Y1 - 2017/6/15

N2 - 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.

AB - 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.

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U2 - 10.1103/PhysRevD.95.122003

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