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

Document #:

LIGO-P1700019-v28

Document type:

P - Publications

Abstract:

Results are presented from a semi-coherent 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 (O1). 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% = 4.0e−25, 8.3e−25, and 3.0e−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.

Files in Document:

• Viterbi_o1_search_paper.pdf (2.7 MB)

Topics:

• Continuous Wave

Author Groups:

• LVC

Related Documents:

Referenced by:

• LIGO-P1600297-v25: Upper Limits on Gravitational Waves from Scorpius X-1 from a Model-Based Cross-Correlation Search in Advanced LIGO Data
• LIGO-P2100372-v1: Erratum: Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model [Phys.~Rev.~D 95, 122003 (2017)]

Journal References:

Published in Phys Rev D vol. 95 pg. 122003.