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© Research
Publication : Physical review letters

All-sky LIGO search for periodic gravitational waves in the early fifth-science-run data

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Physical review letters - 20 Mar 2009

Abbott et al.

Link to Pubmed [PMID] – 19392186

Phys. Rev. Lett. 2009 Mar;102(11):111102

We report on an all-sky search with the LIGO detectors for periodic gravitational waves in the frequency range 50-1100 Hz and with the frequency’s time derivative in the range -5 x 10{-9}-0 Hz s{-1}. Data from the first eight months of the fifth LIGO science run (S5) have been used in this search, which is based on a semicoherent method (PowerFlux) of summing strain power. Observing no evidence of periodic gravitational radiation, we report 95% confidence-level upper limits on radiation emitted by any unknown isolated rotating neutron stars within the search range. Strain limits below 10{-24} are obtained over a 200-Hz band, and the sensitivity improvement over previous searches increases the spatial volume sampled by an average factor of about 100 over the entire search band. For a neutron star with nominal equatorial ellipticity of 10{-6}, the search is sensitive to distances as great as 500 pc.

http://www.ncbi.nlm.nih.gov/pubmed/19392186