The NANOGrav 12.5-year Data Set: Wideband Timing of 47 Millisecond Pulsars

Abstract

We present a new analysis of the profile data from the 47 millisecond pulsars comprising the 12.5-year data set of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), which is presented in a parallel paper (Alam et al. 2021a; NG12.5). Our reprocessing is performed using "wideband" timing methods, which use frequency-dependent template profiles, simultaneous time-of-arrival (TOA) and dispersion measure (DM) measurements from broadband observations, and novel analysis techniques. In particular, the wideband DM measurements are used to constrain the DM portion of the timing model. We compare the ensemble timing results to NG12.5 by examining the timing residuals, timing models, and noise model components. There is a remarkable level of agreement across all metrics considered. Our best-timed pulsars produce encouragingly similar results to those from NG12.5. In certain cases, such as high-DM pulsars with profile broadening, or sources that are weak and scintillating, wideband timing techniques prove to be beneficial, leading to more precise timing model parameters by 10-15%. The high-precision, multi-band measurements of several pulsars indicate frequency-dependent DMs. Compared to the narrowband analysis in NG12.5, the TOA volume is reduced by a factor of 33, which may ultimately facilitate computational speed-ups for complex pulsar timing array analyses. This first wideband pulsar timing data set is a stepping stone, and its consistent results with NG12.5 assure us that such data sets are appropriate for gravitational wave analyses.

62 pages, 55 figures, 5 tables, 3 appendices. Data available at http://nanograv.org/data/ and via DOI 10.5281/zenodo.4312887

References in corpus (33)

• PSRCHIVE and PSRFITS An Open Approach to Radio Pulsar Data Storage and Analysis
• Tempo2, a new pulsar timing package. II: The timing model and precision estimates
• The International Pulsar Timing Array: Second data release
• Expected properties of the first gravitational wave signal detected with pulsar timing arrays
• An ultra-wide bandwidth (704 to 4032 MHz) receiver for the Parkes radio telescope
• The MeerKAT Telescope as a Pulsar Facility: System verification and early science results from MeerTime
• The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 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
• The Parkes Pulsar Timing Array Project: Second data release
• New advances in the Gaussian-process approach to pulsar-timing data analysis
• Wide-band Simultaneous Observations of Pulsars: Disentangling Dispersion Measure and Profile Variations
• The NANOGrav Nine-Year Data Set: Excess Noise in Millisecond Pulsar Arrival Times
• High-fidelity radio astronomical polarimetry using a millisecond pulsar as a polarized reference source
• Scattering analysis of LOFAR pulsar observations
• Measuring pulse times of arrival from broadband pulsar observations
• Electron Density Structure of the Local Galactic Disk
• On the formation of PSR J1640+2224: a neutron star born massive?
• Discovery of a close-separation binary quasar at the heart of a z~0.2 merging galaxy and its implications for low-frequency gravitational waves
• A Massive Millisecond Pulsar in an Eccentric Binary
• The disturbance of a millisecond pulsar magnetosphere
• Low-rank approximations for large stationary covariance matrices, as used in the Bayesian and generalized-least-squares analysis of pulsar-timing data
• Model-based asymptotically optimal dispersion measure correction for pulsar timing
• On the formation of eccentric millisecond pulsars with helium white-dwarf companions
• First detection of frequency-dependent, time-variable dispersion measures
• Modelling and mitigating refractive propagation effects in precision pulsar timing observations
• Search for transitions between states in redbacks and black widows using seven years of Fermi-LAT observations
• Improving the precision of pulsar timing through polarization statistics
• Wide-band Profile Domain Pulsar Timing Analysis
• Probing supermassive black hole mergers and stalling with pulsar timing arrays
• Taming outliers in pulsar-timing datasets with hierarchical likelihoods and Hamiltonian sampling
• Generative pulsar timing analysis
• Timing stability of black widow pulsars

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