The NANOGrav Nine-Year Data Set: Excess Noise in Millisecond Pulsar Arrival Times

Abstract

Gravitational wave astronomy using a pulsar timing array requires high-quality millisecond pulsars, correctable interstellar propagation delays, and high-precision measurements of pulse times of arrival. Here we identify noise in timing residuals that exceeds that predicted for arrival time estimation for millisecond pulsars observed by the North American Nanohertz Observatory for Gravitational Waves. We characterize the excess noise using variance and structure function analyses. We find that 26 out of 37 pulsars show inconsistencies with a white-noise-only model based on the short timescale analysis of each pulsar and we demonstrate that the excess noise has a red power spectrum for 15 pulsars. We also decompose the excess noise into chromatic (radio-frequency-dependent) and achromatic components. Associating the achromatic red-noise component with spin noise and including additional power-spectrum-based estimates from the literature, we estimate a scaling law in terms of spin parameters (frequency and frequency derivative) and data-span length and compare it to the scaling law of Shannon \& Cordes (2010). We briefly discuss our results in terms of detection of gravitational waves at nanohertz frequencies.

arXiv comment20 pages, 16 figures, to be published in ApJ

References in corpus (35)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• The Confrontation between General Relativity and Experiment
• TEMPO2, a new pulsar timing package. I: Overview
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• The Parkes Pulsar Timing Array Project
• The International Pulsar Timing Array: First Data Release
• The North American Nanohertz Observatory for Gravitational Waves
• Limits on the Stochastic Gravitational Wave Background from the North American Nanohertz Observatory for Gravitational Waves
• Characterization of transient noise in Advanced LIGO relevant to gravitational wave signal GW150914
• The NANOGrav Nine-year Data Set: Limits on the Isotropic Stochastic Gravitational Wave Background
• Assessing the Role of Spin Noise in the Precision Timing of Millisecond Pulsars
• Measurement and correction of variations in interstellar dispersion in high-precision pulsar timing
• The NANOGrav Nine-year Data Set: Observations, Arrival Time Measurements, and Analysis of 37 Millisecond Pulsars
• Timing stability of millisecond pulsars and prospects for gravitational-wave detection
• Pulsar timing analysis in the presence of correlated noise
• Masses, Parallax, and Relativistic Timing of the PSR J1713+0747 Binary System
• NANOGrav Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries in Circular Orbits
• Limitations in timing precision due to single-pulse shape variability in millisecond pulsars
• A study of spatial correlations in pulsar timing array data
• From Spin Noise to Systematics: Stochastic Processes in the First International Pulsar Timing Array Data Release
• Frequency-Dependent Dispersion Measures and Implications for Pulsar Timing
• Testing Theories of Gravitation Using 21-Year Timing of Pulsar Binary J1713+0747
• Elementary Wideband Timing of Radio Pulsars
• An Asteroid Belt Interpretation for the Timing Variations of the Millisecond Pulsar B1937+21
• High-fidelity radio astronomical polarimetry using a millisecond pulsar as a polarized reference source
• The NANOGrav Nine-year Data Set: Monitoring Interstellar Scattering Delays
• NANOGrav Constraints on Gravitational Wave Bursts with Memory
• The NANOGrav Nine-Year Data Set: Noise Budget for Pulsar Arrival Times on Intraday Timescales
• PSR J1024-0719: A Millisecond Pulsar in an Unusual Long-Period Orbit
• Systematic and Stochastic Variations in Pulsar Dispersion Measures
• A millisecond pulsar in an extremely wide binary system
• The disturbance of a millisecond pulsar magnetosphere
• Pulsar Timing Errors from Asynchronous Multi-Frequency Sampling of Dispersion Measure Variations
• The Benefits of VLBI Astrometry to Pulsar Timing Array Searches for Gravitational Radiation
• Revealing intermittency in experimental data with steep power spectra

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