Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544

Abstract

We describe a directed search for continuous gravitational waves in data from the sixth LIGO science run. The target was the nearby globular cluster NGC 6544 at a distance of 2.7 kpc. The search covered a broad band of frequencies along with first and second frequency derivatives for a fixed sky position. The search coherently integrated data from the two LIGO interferometers over a time span of 9.2 days using the matched-filtering F-statistic. We found no gravitational-wave signals and set 95% confidence upper limits as stringent as 6.0 X 10^{-25} on intrinsic strain and 8.5 X 10^{-6} on fiducial ellipticity. These values beat the indirect limits from energy conservation for stars with characteristic spindown ages older than 300 years and are within the range of theoretical predictions for possible neutron-star ellipticities. An important feature of this search was use of a barycentric resampling algorithm which substantially reduced computational cost; this method will be used extensively in searches of Advanced LIGO and Virgo detector data.

arXiv comment15 pages, 4 figures

References in corpus (45)

• Advanced LIGO
• Data analysis of gravitational-wave signals from spinning neutron stars. I. The signal and its detection
• The Gravitational Million-Body Problem
• Search templates for gravitational waves from inspiraling binaries: Choice of template spacing
• A Debris Disk Around An Isolated Young Neutron Star
• A Young White Dwarf Companion to Pulsar 1620-26: Evidence for Early Planet Formation
• Searching for periodic sources with LIGO
• Maximum elastic deformations of compact stars with exotic equations of state
• Beating the spin-down limit on gravitational wave emission from the Crab pulsar
• Setting upper limits on the strength of periodic gravitational waves using the first science data from the GEO600 and LIGO detectors
• Maximum elastic deformations of relativistic stars
• Upper limits on gravitational wave emission from 78 radio pulsars
• Gravitational waves from known pulsars: results from the initial detector era
• Coherent searches for periodic gravitational waves from unknown isolated sources and Scorpius X-1: results from the second LIGO science run
• Limits on gravitational wave emission from selected pulsars using LIGO data
• The generalized F-statistic: multiple detectors and multiple GW pulsars
• Beating the spin-down limit on gravitational wave emission from the Vela pulsar
• Searches for gravitational waves from known pulsars with S5 LIGO data
• First search for gravitational waves from the youngest known neutron star
• All-sky search for periodic gravitational waves in LIGO S4 data
• The Einstein@Home search for periodic gravitational waves in LIGO S4 data
• Searching for gravitational waves from Cassiopeia A with LIGO
• The search for continuous gravitational waves: metric of the multi-detector F-statistic
• How to adapt broad-band gravitational-wave searches for r-modes
• Upper limit map of a background of gravitational waves
• Directional limits on persistent gravitational waves using LIGO S5 science data
• Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data
• Einstein@Home search for periodic gravitational waves in early S5 LIGO data
• Targeted search for continuous gravitational waves: Bayesian versus maximum-likelihood statistics
• First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform
• All-sky LIGO Search for Periodic Gravitational Waves in the Early S5 Data
• Detecting gravitational waves from mountains on neutron stars in the Advanced Detector Era
• All-sky Search for Periodic Gravitational Waves in the Full S5 LIGO Data
• Search for continuous gravitational waves: Improving robustness versus instrumental artifacts
• A directed search for continuous Gravitational Waves from the Galactic Center
• Searches for continuous gravitational waves from nine young supernova remnants
• First all-sky search for continuous gravitational waves from unknown sources in binary systems
• Estimating the sensitivity of wide-parameter-space searches for gravitational-wave pulsars
• Planets in Globular Clusters?
• Blandford's Argument: The Strongest Continuous Gravitational Wave Signal
• Implementation of an F-statistic all-sky search for continuous gravitational waves in Virgo VSR1 data
• Resistive relaxation of a magnetically confined mountain on an accreting neutron star
• Implementation of barycentric resampling for continuous wave searches in gravitational wave data
• Data analysis of gravitational-wave signals from spinning neutron stars. V. A narrow-band all-sky search
• Application of a Hough search for continuous gravitational waves on data from the 5th LIGO science run

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• Searches for continuous gravitational waves from young supernova remnants in the early third observing run of Advanced LIGO and Virgo
• Efficient Estimation of Barycentered Relative Time Delays for Distant Gravitational Wave Sources
• Gravitational waves from spinning neutron stars as not-quite-standard sirens