First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform

B. Abbott*, R. Abbott, R. Adhikari, A. Ageev, J. Agresti, B. Allen, J. Allen, R. Amin, S. B. Anderson, W. G. Anderson, M. Araya, H. Armandula, M. Ashley, F. Asiri, P. Aufmuth, C. Aulbert, S. Babak, R. Balasubramanian, S. Ballmer, B. C. BarishC. Barker, D. Barker, M. Barnes, B. Barr, M. A. Barton, K. Bayer, R. Beausoleil, K. Belczynski, R. Bennett, S. J. Berukoff, J. Betzwieser, B. Bhawal, I. A. Bilenko, G. Billingsley, E. Black, K. Blackburn, L. Blackburn, B. Bland, B. Bochner, L. Bogue, R. Bork, S. Bose, P. R. Brady, V. B. Braginsky, J. E. Brau, D. A. Brown, A. Bullington, A. Bunkowski, A. Buonanno, R. Burgess

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Scopus citations


We perform a wide parameter-space search for continuous gravitational waves over the whole sky and over a large range of values of the frequency and the first spin-down parameter. Our search method is based on the Hough transform, which is a semicoherent, computationally efficient, and robust pattern recognition technique. We apply this technique to data from the second science run of the LIGO detectors and our final results are all-sky upper limits on the strength of gravitational waves emitted by unknown isolated spinning neutron stars on a set of narrow frequency bands in the range 200-400 Hz. The best upper limit on the gravitational-wave strain amplitude that we obtain in this frequency range is 4.43×10-23.

Original languageEnglish (US)
Article number102004
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number10
StatePublished - Nov 15 2005

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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