Directed search for continuous gravitational waves from the Galactic center

J. Aasi, N. A. Lockerbie, K. V. Tokmakov, LIGO Scientific Collaboration, Virgo Collaboration

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Abstract

We present the results of a directed search for continuous gravitational waves from unknown, isolated neutron stars in the Galactic center region, performed on two years of data from LIGO's fifth science run from two LIGO detectors. The search uses a semicoherent approach, analyzing coherently 630 segments, each spanning 11.5 hours, and then incoherently combining the results of the single segments. It covers gravitational wave frequencies in a range from 78 to 496 Hz and a frequency-dependent range of first-order spindown values down to -7.86 x 10(-8) Hz/s at the highest frequency. No gravitational waves were detected. The 90% confidence upper limits on the gravitational wave amplitude of sources at the Galactic center are similar to 3.35 x 10(-25) for frequencies near 150 Hz. These upper limits are the most constraining to date for a large-parameter-space search for continuous gravitational wave signals.
Original languageEnglish
Article number102002
Number of pages13
JournalPhysical Review D
Volume88
Issue number10
DOIs
Publication statusPublished - 18 Nov 2013

Keywords

  • continuous gravitational wave
  • Galactic centre region
  • gravitational wave signals
  • LIGO scientific collaboration

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    Aasi, J., Lockerbie, N. A., Tokmakov, K. V., LIGO Scientific Collaboration, & Virgo Collaboration (2013). Directed search for continuous gravitational waves from the Galactic center. Physical Review D, 88(10), [102002]. https://doi.org/10.1103/PhysRevD.88.102002