Parameter-space metric of semicoherent searches for continuous gravitational waves

Abstract

Continuous gravitational-wave (CW) signals such as emitted by spinning neutron stars are an important target class for current detectors. However, the enormous computational demand prohibits fully coherent broadband all-sky searches for prior unknown CW sources over wide ranges of parameter space and for yearlong observation times. More efficient hierarchical "semicoherent" search strategies divide the data into segments much shorter than one year, which are analyzed coherently; then detection statistics from different segments are combined incoherently. To optimally perform the incoherent combination, understanding of the underlying parameter-space structure is requisite. This problem is addressed here by using new coordinates on the parameter space, which yield the first analytical parameter-space metric for the incoherent combination step. This semicoherent metric applies to broadband all-sky surveys (also embedding directed searches at fixed sky position) for isolated CW sources. Furthermore, the additional metric resolution attained through the combination of segments is studied. From the search parameters (sky position, frequency, and frequency derivatives), solely the metric resolution in the frequency derivatives is found to significantly increase with the number of segments.

14 pages, 5 figures (matching Phys.Rev.D version)

References in corpus (34)

• LIGO: The Laser Interferometer Gravitational-Wave Observatory
• Data analysis of gravitational-wave signals from spinning neutron stars. I. The signal and its detection
• Search templates for gravitational waves from inspiraling binaries: Choice of template spacing
• Gravitational waves from hot young rapidly rotating neutron stars
• Deformations of Accreting Neutron Star Crusts and Gravitational Wave Emission
• Gravitational Waves from Neutron Stars with Large Toroidal B-fields
• Searching for periodic sources with LIGO
• Maximum elastic deformations of compact stars with exotic equations of state
• Searching for periodic sources with LIGO. II: Hierarchical searches
• Detecting gravitational wave emission from the known accreting neutron stars
• Beating the spin-down limit on gravitational wave emission from the Crab pulsar
• Gravitational waves from coalescing binaries: detection strategies and Monte Carlo estimation of parameters
• The Hough transform search for continuous gravitational waves
• The generalized F-statistic: multiple detectors and multiple GW pulsars
• All-sky search for periodic gravitational waves in LIGO S4 data
• The Einstein@Home search for periodic gravitational waves in LIGO S4 data
• Gravitational waves from freely precessing neutron stars
• Searching for gravitational waves from Cassiopeia A with LIGO
• The search for continuous gravitational waves: metric of the multi-detector F-statistic
• Gravitational-Wave Data Analysis. Formalism and Sample Applications: The Gaussian Case
• Einstein@Home search for periodic gravitational waves in early S5 LIGO data
• All-sky LIGO Search for Periodic Gravitational Waves in the Early S5 Data
• Template-based searches for gravitational waves: efficient lattice covering of flat parameter spaces
• Improved Stack-Slide Searches for Gravitational-Wave Pulsars
• Exploiting Large-Scale Correlations to Detect Continuous Gravitational Waves
• The cross-correlation search for periodic gravitational waves
• Random template banks and relaxed lattice coverings
• Data analysis of gravitational-wave signals from spinning neutron stars. IV. An all-sky search
• Data analysis of gravitational-wave signals from spinning neutron stars. II. Accuracy of estimation of parameters
• Data analysis of gravitational-wave signals from spinning neutron stars. III. Detection statistics and computational requirements
• Parameter-space correlations of the optimal statistic for continuous gravitational-wave detection
• Cover art: issues in the metric-guided and metric-less placement of random and stochastic template banks
• Data analysis of gravitational-wave signals from spinning neutron stars. V. A narrow-band all-sky search
• Global parameter-space correlations of coherent searches for continuous gravitational waves

Cited by in corpus (48)

• Enhancing Gravitational-Wave Science with Machine Learning
• All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO O2 data
• Searches for Continuous-Wave Gravitational Radiation
• Discovery of Nine Gamma-Ray Pulsars in Fermi-LAT Data Using a New Blind Search Method
• Binary Millisecond Pulsar Discovery via Gamma-Ray Pulsations
• Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data
• First low-frequency Einstein@Home all-sky search for continuous gravitational waves in Advanced LIGO data
• Search method for long-duration gravitational-wave transients from neutron stars
• Searches for continuous gravitational waves from neutron stars: A twenty-year retrospective
• Search for Continuous Gravitational Waves: Optimal StackSlide method at fixed computing cost
• Search methods for continuous gravitational-wave signals from unknown sources in the advanced-detector era
• Status and perspectives of Continuous Gravitational Wave searches
• PSR J1838-0537: Discovery of a young, energetic gamma-ray pulsar
• Einstein@Home all-sky search for continuous gravitational waves in LIGO O2 public data
• Parameter-space metric for all-sky semicoherent searches for gravitational-wave pulsars
• Hierarchical multi-stage MCMC follow-up of continuous gravitational wave candidates
• Lattice template placement for coherent all-sky searches for gravitational-wave pulsars
• Flat parameter-space metric for all-sky searches for gravitational-wave pulsars
• Results from an Einstein@Home search for continuous gravitational waves from Cassiopeia A, Vela Jr. and G347.3
• Implementing a semicoherent search for continuous gravitational waves using optimally-constructed template banks
• Einstein@Home Discovery of a PALFA Millisecond Pulsar in an Eccentric Binary Orbit
• Results of the deepest all-sky survey for continuous gravitational waves on LIGO S6 data running on the Einstein@Home volunteer distributed computing project
• An Einstein@home search for continuous gravitational waves from Cassiopeia A
• Search for Continuous Gravitational Waves from the Central Compact Objects in Supernova Remnants Cassiopeia A, Vela Jr. and G347.3-0.5
• Hierarchical follow-up of sub-threshold candidates of an all-sky Einstein@Home search for continuous gravitational waves on LIGO sixth science run data
• Optimal directed searches for continuous gravitational waves
• Designing a cross-correlation search for continuous-wave gravitational radiation from a neutron star in the supernova remnant SNR 1987A
• Application of a hierarchical MCMC follow-up to Advanced LIGO continuous gravitational-wave candidates
• Fully coherent follow-up of continuous gravitational-wave candidates
• Empirically estimating the distribution of the loudest candidate from a gravitational-wave search
• Empirically extending the range of validity of parameter-space metrics for all-sky searches for gravitational-wave pulsars
• Optimally setting up directed searches for continuous gravitational waves in Advanced LIGO O1 data
• Spherical ansatz for parameter-space metrics
• Sliding coherence window technique for hierarchical detection of continuous gravitational waves
• Results from an Einstein@Home search for continuous gravitational waves from G347.3 at low frequencies in LIGO O2 data
• Fully coherent follow-up of continuous gravitational-wave candidates: an application to Einstein@Home results
• Results of an all-sky high-frequency Einstein@Home search for continuous gravitational waves in LIGO's fifth science run
• Time-frequency track distance for comparing continuous gravitational wave signals
• Optimizing StackSlide setup and data selection for continuous-gravitational-wave searches in realistic detector data
• Improved all-sky search method for continuous gravitational waves from unknown neutron stars in binary systems
• Constraining the ellipticity and frequency of binary neutron star remnant via its gravitational-wave and electromagnetic radiations
• Toward a computationally-efficient follow-up pipeline for blind continuous gravitational-wave searches
• Reduced order modelling in searches for continuous gravitational waves - I. Barycentering time delays
• One-stop strategy to search for long-duration gravitational-wave signals
• Results from an Einstein@Home search for continuous gravitational waves from Cassiopeia A and Vela Jr. using LIGO O2 data
• Einstein@Home all-sky "bucket" search for continuous gravitational waves in LIGO O3 public data
• Analysing one- and two-bit data to reduce memory requirements for F-statistic-based gravitational wave searches
• High-frequency continuous gravitational waves searched in LIGO O3 public data with Einstein@Home