Search for continuous gravitational waves: improving robustness versus instrumental artifacts

@article{Keitel2014SearchFC,
  title={Search for continuous gravitational waves: improving robustness versus instrumental artifacts},
  author={David Keitel and Reinhard Prix and Maria Alessandra Papa and Paola Leaci and M.I. Siddiqi},
  journal={Physical Review D},
  year={2014},
  volume={89},
  pages={064023}
}
The standard multidetector F-statistic for continuous gravitational waves is susceptible to false alarms from instrumental artifacts, for example monochromatic sinusoidal disturbances (“lines”). This vulnerability to line artifacts arises because the F-statistic compares the signal hypothesis to a Gaussian-noise hypothesis, and hence is triggered by anything that resembles the signal hypothesis more than Gaussian noise. Various ad-hoc veto methods to deal with such line artifacts have been… 

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References

SHOWING 1-10 OF 40 REFERENCES
Gravitational waves from accreting neutron stars and Cassiopeia A
An Australian Postgraduate Award, an ANU Vice-Chancellor's Supplementary Scholarship, and from the Australian Research Council through grants DP0451021, SR0567380, and DP0770426. The LIGO Hanford
Phys
  • Rev. D 81, 062003
  • 2010
Phys
  • Rev. D 58, 063001
  • 1998
LIGO Scientific Collaboration and Virgo Collaboration)
  • Phys. Rev. D
  • 2013
The LIGO Scientific Collaboration and the Virgo Collaboration)
  • Phys. Rev. D 87,
  • 2013
Classical Quantum Gravity 26
  • 204013
  • 2009
Phys
  • Rev. D 84, 023007
  • 2011
The LIGO Scientific Collaboration
Class
...
...