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, h_^95% = 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.

Abbott, B. ., Abbott, R., Abbott, T. ., Acernese, F., Ackley, K., Adams, C., et al. (2017). Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model. PHYSICAL REVIEW D, 95(12), 122003-1-122003-20 [10.1103/PhysRevD.95.122003].

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

BRANCHESI, MARICA;CERBONI BAIARDI, LORENZO;Cuoco, E.;GRECO, GIUSEPPE;GUIDI, GIANLUCA MARIA;MONTANI, MATTEO;PIERGIOVANNI, FRANCESCO;VICERE', ANDREA;
2017

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, h_^95% = 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.
2017
Abbott, B. ., Abbott, R., Abbott, T. ., Acernese, F., Ackley, K., Adams, C., et al. (2017). Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model. PHYSICAL REVIEW D, 95(12), 122003-1-122003-20 [10.1103/PhysRevD.95.122003].
Abbott, B.  .p.; Abbott, R.; Abbott, T.  .d.; Acernese, F.; Ackley, K.; Adams, C.; Adams, T.; Addesso, P.; Adhikari, R.  .x.; Adya, V.  .b.; Affeldt, ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/866100
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