Journal article
Hidden Markov model tracking of continuous gravitational waves from a binary neutron star with wandering spin. II. Binary orbital phase tracking
S Suvorova, P Clearwater, A Melatos, L Sun, W Moran, RJ Evans
Physical Review D | AMER PHYSICAL SOC | Published : 2017
Abstract
A hidden Markov model (HMM) scheme for tracking continuous-wave gravitational radiation from neutron stars in low-mass x-ray binaries (LMXBs) with wandering spin is extended by introducing a frequency-domain matched filter, called the J-statistic, which sums the signal power in orbital sidebands coherently. The J-statistic is similar but not identical to the binary-modulated F-statistic computed by demodulation or resampling. By injecting synthetic LMXB signals into Gaussian noise characteristic of the Advanced Laser Interferometer Gravitational-wave Observatory (Advanced LIGO), it is shown that the J-statistic HMM tracker detects signals with characteristic wave strain h0≥2×10-26 in 370 d o..
View full abstractRelated Projects (2)
Grants
Awarded by Air Force Office of Scientific Research
Funding Acknowledgements
We thank the LIGO Scientific Collaboration Continuous Wave Working Group for informative discussions. The synthetic data for Stage I of the Sco X-1 MDC were prepared primarily by Chris Messenger with the assistance of members of the MDC team [25]. P. C. is supported by a Melbourne Research Scholarship and a CSIRO Office of the Chief Executive Postgraduate Ph.D. Scholarship in Zettabyte Data Management. L.S. is supported by an Australian Postgraduate Award. This work was supported by the Multi-modal Australian ScienceS Imaging and Visualisation Environment (MASSIVE), by Australian Research Council (ARC) Discovery Project No. DP110103347, ARC Centre of Excellence No. CE170100004 and by the U.S. Air Force Office of Scientific Research under Grant No. FA9550-12-1-0418.