Analysing one- and two-bit data to reduce memory requirements for F-statistic-based gravitational wave searches

Abstract

Searches for continuous-wave gravitational radiation in data collected by modern long-baseline interferometers, such as the Laser Interferometer Gravitational-wave Observatory (LIGO), the Virgo interferometer and the Kamioka Gravitational Wave Detector (KAGRA), can be memory intensive. A digitisation scheme is described that reduces the 64-bit interferometer output to a one- or two-bit data stream while minimising distortion and achieving considerable reduction in storage and input/output cost. For the representative example of the coherent, maximum-likelihood matched filter known as the F-statistic, it is found using Monte-Carlo simulations that the injected signal only needs to be ~24 per cent stronger (for one-bit data) and ~6.4 per cent stronger (for two bit data with optimal thresholds) than a 64-bit signal in order to be detected with 90 per cent probability in Gaussian noise. The foregoing percentages do not change significantly when the signal frequency decreases secularly, or when the noise statistics are not Gaussian, as verified with LIGO Science Run 6 data.

17 pages, 6 figures; accepted for publication in Astrophysical Journal

References in corpus (44)

• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Advanced LIGO
• Characterization of the LIGO detectors during their sixth science run
• Deformations of Accreting Neutron Star Crusts and Gravitational Wave Emission
• Upper limits on gravitational wave emission from 78 radio pulsars
• The Hough transform search for continuous gravitational waves
• Limits on gravitational wave emission from selected pulsars using LIGO data
• Gravitational Radiation from an Accreting Millisecond Pulsar with a Magnetically Confined Mountain
• Identification and mitigation of narrow spectral artifacts that degrade searches for persistent gravitational waves in the first two observing runs of Advanced LIGO
• The search for continuous gravitational waves: metric of the multi-detector F-statistic
• Method for all-sky searches of continuous gravitational wave signals using the frequency-Hough transform
• Spinning down newborn neutron stars: nonlinear development of the r-mode instability
• First low-frequency Einstein@Home all-sky search for continuous gravitational waves in Advanced LIGO data
• Search for gravitational waves from Scorpius X-1 in the first Advanced LIGO observing run with a hidden Markov model
• First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform
• Hidden Markov model tracking of continuous gravitational waves from a neutron star with wandering spin
• All-sky Search for Periodic Gravitational Waves in the Full S5 LIGO Data
• Exploiting Large-Scale Correlations to Detect Continuous Gravitational Waves
• The cross-correlation search for periodic gravitational waves
• Pulsar Discovery by Global Volunteer Computing
• R-mode frequencies of slowly rotating relativistic neutron stars with realistic equations of state
• Search for gravitational waves from Scorpius X-1 in the second Advanced LIGO observing run with an improved hidden Markov model
• Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data
• A directed search for gravitational waves from Scorpius X-1 with initial LIGO
• Parameter-space metric of semicoherent searches for continuous gravitational waves
• Hidden Markov model tracking of continuous gravitational waves from a binary neutron star with wandering spin. II. Binary orbital phase tracking
• An all-sky search algorithm for continuous gravitational waves from spinning neutron stars in binary systems
• Parameter-space metric for all-sky semicoherent searches for gravitational-wave pulsars
• Loosely coherent searches for sets of well-modeled signals
• Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data
• A Baseband Recorder for Radio Pulsar Observations
• Implementing a semicoherent search for continuous gravitational waves using optimally-constructed template banks
• Search for gravitational waves from five low mass X-ray binaries in the second Advanced LIGO observing run with an improved hidden Markov model
• Implementation of the frequency-modulated sideband search method for gravitational waves from low mass X-ray binaries
• Designing a cross-correlation search for continuous-wave gravitational radiation from a neutron star in the supernova remnant SNR 1987A
• Search for gravitational waves from twelve young supernova remnants with a hidden Markov model in Advanced LIGO's second observing run
• Noise parametric identification and whitening for LIGO 40-meter interferometer data
• Hidden Markov model tracking of continuous gravitational waves from a neutron star with wandering spin. III. Rotational phase tracking
• A Novel Universal Statistic for Computing Upper Limits in Ill-behaved Background
• 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
• Search for continuous gravitational waves from ten H.E.S.S. sources using a hidden Markov model
• Tuning into Scorpius X-1: adapting a continuous gravitational-wave search for a known binary system
• Resampling to accelerate cross-correlation searches for continuous gravitational waves from binary systems