The NANOGrav Nine-year Data Set: Observations, Arrival Time Measurements, and Analysis of 37 Millisecond Pulsars

Abstract

We present high-precision timing observations spanning up to nine years for 37 millisecond pulsars monitored with the Green Bank and Arecibo radio telescopes as part of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) project. We describe the observational and instrumental setups used to collect the data, and methodology applied for calculating pulse times of arrival; these include novel methods for measuring instrumental offsets and characterizing low signal-to-noise ratio timing results. The time of arrival data are fit to a physical timing model for each source, including terms that characterize time-variable dispersion measure and frequency-dependent pulse shape evolution. In conjunction with the timing model fit, we have performed a Bayesian analysis of a parameterized timing noise model for each source, and detect evidence for excess low-frequency, or "red," timing noise in 10 of the pulsars. For 5 of these cases this is likely due to interstellar medium propagation effects rather than intrisic spin variations. Subsequent papers in this series will present further analysis of this data set aimed at detecting or limiting the presence of nanohertz-frequency gravitational wave signals.

37 pages, 43 figures, this revision matches the final ApJ accepted version

References in corpus (16)

• Tests of general relativity from timing the double pulsar
• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• Timing Measurements of the Relativistic Binary Pulsar PSR B1913+16
• European Pulsar Timing Array Limits On An Isotropic Stochastic Gravitational-Wave Background
• The stochastic gravitational-wave background from massive black hole binary systems: implications for observations with Pulsar Timing Arrays
• 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
• 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
• New advances in the Gaussian-process approach to pulsar-timing data analysis
• Searching for gravitational wave memory bursts with the Parkes Pulsar Timing Array
• Testing Theories of Gravitation Using 21-Year Timing of Pulsar Binary J1713+0747
• Low-rank approximations for large stationary covariance matrices, as used in the Bayesian and generalized-least-squares analysis of pulsar-timing data
• Assessing Pulsar Timing Array Sensitivity to Gravitational Wave Bursts with Memory
• A 24-Hour Global Campaign To Assess Precision Timing of the Millisecond Pulsar J1713+0747
• Pulsar Timing Errors from Asynchronous Multi-Frequency Sampling of Dispersion Measure Variations

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