An improved algorithm for narrow-band searches of continuous gravitational waves

Abstract

Continuous gravitational waves signals, emitted by asymmetric spinning neutron stars, are among the main targets of current detectors like Advanced LIGO and Virgo. In the case of sources, like pulsars, which rotational parameters are measured through electromagnetic observations, typical searches assume that the gravitational wave frequency is at a given known fixed ratio with respect to the star rotational frequency. For instance, for a neutron star rotating around one of its principal axis of inertia the gravitational signal frequency would be exactly two times the rotational frequency of the star. It is possible, however, that this assumption is wrong. This is why search algorithms able to take into account a possible small mismatch between the gravitational waves frequency and the frequency inferred from electromagnetic observations have been developed. In this paper we present an improved pipeline to perform such narrow-band searches for continuous gravitational waves from neutron stars, about three orders of magnitude faster than previous implementations. The algorithm that we have developed is based on the {\it 5-vectors} framework and is able to perform a fully coherent search over a frequency band of width $\mathcal{O}$(Hertz) and for hundreds of spin-down values running a few hours on a standard workstation. This new algorithm opens the possibility of long coherence time searches for objects which rotational parameters are highly uncertain.

19 pages, 8 figures, 6 tables, submitted to CQG

References in corpus (12)

• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
• First search for gravitational waves from known pulsars with Advanced LIGO
• Searching for gravitational waves from Cassiopeia A with LIGO
• Method for all-sky searches of continuous gravitational wave signals using the frequency-Hough transform
• How to adapt broad-band gravitational-wave searches for r-modes
• Einstein@Home all-sky search for periodic gravitational waves in LIGO S5 data
• Discovery of the radio and X-ray counterpart of TeV Gamma-ray source HESS J1731-347
• Narrow-band search of continuous gravitational-wave signals from Crab and Vela pulsars in Virgo VSR4 data
• A method for narrow-band searches of continuous gravitational wave signals
• A comparison of methods for the detection of gravitational waves from unknown neutron stars
• Results of the deepest all-sky survey for continuous gravitational waves on LIGO S6 data running on the Einstein@Home volunteer distributed computing project
• The effect of timing noise on targeted and narrow-band coherent searches for continuous gravitational waves from pulsars

Cited by in corpus (14)

• Direct constraints on ultra-light boson mass from searches for continuous gravitational waves
• Gravitational-wave constraints on the equatorial ellipticity of millisecond pulsars
• Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run
• Narrowband searches for continuous and long-duration transient gravitational waves from known pulsars in the LIGO-Virgo third observing run
• First narrow-band search for continuous gravitational waves from known pulsars in advanced detector data
• Status and perspectives of Continuous Gravitational Wave searches
• A new data analysis framework for the search of continuous gravitational wave signals
• Establishing the significance of continuous gravitational-wave detections from known pulsars
• Search for continuous gravitational waves from known pulsars in the first part of the fourth LIGO-Virgo-KAGRA observing run
• Search for continuous gravitational wave signals from luminous dark photon superradiance clouds with LVK O3 observations
• A directed continuous-wave search from Scorpius X-1 with the five-vector resampling technique
• Phase decomposition of the template metric for continuous gravitational-wave searches
• Constraints from LIGO O3 data on gravitational-wave emission due to r-modes in the glitching pulsar PSR J0537-6910
• Narrowband searches for continuous gravitational waves from known pulsars in the first two parts of the fourth LIGO--Virgo--KAGRA observing run