A study of spatial correlations in pulsar timing array data

Abstract

Pulsar timing array experiments search for phenomena that produce angular correlations in the arrival times of signals from millisecond pulsars. The primary goal is to detect an isotropic and stochastic gravitational wave background. We use simulated data to show that this search can be affected by the presence of other spatially correlated noise, such as errors in the reference time standard, errors in the planetary ephemeris, the solar wind and instrumentation issues. All these effects can induce significant false detections of gravitational waves. We test mitigation routines to account for clock errors, ephemeris errors and the solar wind. We demonstrate that it is non-trivial to find an effective mitigation routine for the planetary ephemeris and emphasise that other spatially correlated signals may be present in the data.

13 pages, 7 figures. Accepted for publication in MNRAS

References in corpus (13)

• The ATNF Pulsar Catalogue
• Tests of general relativity from timing the double pulsar
• Tempo2, a new pulsar timing package. II: The timing model and precision estimates
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• European Pulsar Timing Array Limits On An Isotropic Stochastic Gravitational-Wave Background
• Gravitational waves from binary supermassive black holes missing in pulsar observations
• Gravitational waves from resolvable massive black hole binary systems and observations with Pulsar Timing Arrays
• Assessing the Role of Spin Noise in the Precision Timing of Millisecond Pulsars
• TEMPO2, a new pulsar timing package. III: Gravitational wave simulation
• Prospects for gravitational-wave detection and supermassive black hole astrophysics with pulsar timing arrays
• An improved solar wind electron-density model for pulsar timing
• Model-based asymptotically optimal dispersion measure correction for pulsar timing
• Recent glitches detected in the Crab pulsar

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• The NANOGrav 12.5-year Data Set: Search For An Isotropic Stochastic Gravitational-Wave Background
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• The NANOGrav 11-year Data Set: Pulsar-timing Constraints On The Stochastic Gravitational-wave Background
• The International Pulsar Timing Array second data release: Search for an isotropic Gravitational Wave Background
• On the evidence for a common-spectrum process in the search for the nanohertz gravitational-wave background with the Parkes Pulsar Timing Array
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• The NANOGrav 11-Year Data Set: Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries
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• The NANOGrav Nine-Year Data Set: Excess Noise in Millisecond Pulsar Arrival Times
• Modeling the uncertainties of solar-system ephemerides for robust gravitational-wave searches with pulsar timing arrays
• All correlations must die: Assessing the significance of a stochastic gravitational-wave background in pulsar-timing arrays
• The noise properties of 42 millisecond pulsars from the European Pulsar Timing Array and their impact on gravitational wave searches
• Noise-marginalized optimal statistic: A robust hybrid frequentist-Bayesian statistic for the stochastic gravitational-wave background in pulsar timing arrays
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• The impact of Solar wind variability on pulsar timing
• The disturbance of a millisecond pulsar magnetosphere
• Forecasting pulsar timing array sensitivity to anisotropy in the stochastic gravitational wave background
• Noise analysis in the European Pulsar Timing Array data release 2 and its implications on the gravitational-wave background search
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• Bayesian pulsar timing and noise analysis with Vela.jl: an overview
• Impact of the observation frequency coverage on the significance of a gravitational wave background detection in PTA data
• Gravitational Wave Searches with Pulsar Timing Arrays. I: Cancellation of Clock and Ephemeris Noises
• The NANOGrav 15 yr data set: Posterior predictive checks for gravitational-wave detection with pulsar timing arrays
• The NANOGrav 15 yr Data Set: Customized Chromatic Noise Models
• Search for Continuous Gravitational Wave Signals in Pulsar Timing Residuals: A New Scalable Approach with Diffusive Nested Sampling
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