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논문

Comprehensive all-sky search for periodic gravitational waves in the sixth science run LIGO data

https://doi.org/10.1103/PhysRevD.94.042002

  • 저자B. P. Abbott et al.(J. J. OH, S. H. OH, E. J. Son)
  • 학술지Physical Review D 94
  • 등재유형
  • 게재일자(2016)


We report on a comprehensive all-sky search for periodic gravitational waves in the frequency band 100–1500 Hz and with a frequency time derivative in the range of [1.18,+1.00]×108  Hz/s. Such a signal could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our galaxy. This search uses the data from the initial LIGO sixth science run and covers a larger parameter space with respect to any past search. A Loosely Coherent detection pipeline was applied to follow up weak outliers in both Gaussian (95% recovery rate) and non-Gaussian (75% recovery rate) bands. No gravitational wave signals were observed, and upper limits were placed on their strength. Our smallest upper limit on worst-case (linearly polarized) strain amplitude h0 is 9.7×1025 near 169 Hz, while at the high end of our frequency range we achieve a worst-case upper limit of 5.5×1024. Both cases refer to all sky locations and entire range of frequency derivative values.


We report on a comprehensive all-sky search for periodic gravitational waves in the frequency band 100–1500 Hz and with a frequency time derivative in the range of [1.18,+1.00]×108  Hz/s. Such a signal could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our galaxy. This search uses the data from the initial LIGO sixth science run and covers a larger parameter space with respect to any past search. A Loosely Coherent detection pipeline was applied to follow up weak outliers in both Gaussian (95% recovery rate) and non-Gaussian (75% recovery rate) bands. No gravitational wave signals were observed, and upper limits were placed on their strength. Our smallest upper limit on worst-case (linearly polarized) strain amplitude h0 is 9.7×1025 near 169 Hz, while at the high end of our frequency range we achieve a worst-case upper limit of 5.5×1024. Both cases refer to all sky locations and entire range of frequency derivative values.

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