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

B. P. Abbott, S. Jawahar, N. A. Lockerbie, K. V. Tokmakov, LIGO Scientific Collaboration, Virgo Collaboration

Research output: Contribution to journalArticle

18 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, h95%0=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.
LanguageEnglish
Article number122003
Number of pages20
JournalPhysical Review D
Volume95
Issue number12
DOIs
Publication statusPublished - 27 Jun 2017

Fingerprint

LIGO (observatory)
gravitational waves
matched filters
circular polarization
neutron stars
torque
confidence
frequency ranges
statistics
polarization
x rays

Keywords

  • LIGO
  • Markov models
  • gravitational waves
  • neutron stars
  • Scorpious X-1

Cite this

Abbott, B. P. ; Jawahar, S. ; Lockerbie, N. A. ; Tokmakov, K. V. ; LIGO Scientific Collaboration ; Virgo Collaboration. / Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model. In: Physical Review D. 2017 ; Vol. 95, No. 12.
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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, h95{\%}0=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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Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model. / Abbott, B. P.; Jawahar, S.; Lockerbie, N. A.; Tokmakov, K. V.; LIGO Scientific Collaboration; Virgo Collaboration.

In: Physical Review D, Vol. 95, No. 12, 122003, 27.06.2017.

Research output: Contribution to journalArticle

TY - JOUR

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

AU - Abbott, B. P.

AU - Jawahar, S.

AU - Lockerbie, N. A.

AU - Tokmakov, K. V.

AU - LIGO Scientific Collaboration

AU - Virgo Collaboration

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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, h95%0=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.

KW - LIGO

KW - Markov models

KW - gravitational waves

KW - neutron stars

KW - Scorpious X-1

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DO - 10.1103/PhysRevD.95.122003

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JO - Physical Review D

T2 - Physical Review D

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