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

B. P. Abbott, S. Jawahar, N.A. Lockerbie, K.V. Tokmakov, LIGO Scientific Collaboration and Virgo Collaboration

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Abstract

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]×10-8 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 9.7×10-25 near 169 Hz, while at the high end of our frequency range we achieve a worst-case upper limit of 5.5×10-24. Both cases refer to all sky locations and entire range of frequency derivative values.
Original languageEnglish
Article number042002
Number of pages14
JournalPhysical Review D
Volume94
Issue number4
DOIs
Publication statusPublished - 15 Aug 2016

Keywords

  • periodic gravitational waves
  • all-sky search
  • gravitational wave signals

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    Abbott, B. P., Jawahar, S., Lockerbie, N. A., Tokmakov, K. V., & LIGO Scientific Collaboration and Virgo Collaboration (2016). Comprehensive all-sky search for periodic gravitational waves in the sixth science run LIGO data. Physical Review D, 94(4), [042002]. https://doi.org/10.1103/PhysRevD.94.042002