The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars

  title={The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars},
  author={Md F. Alam and Zaven Arzoumanian and Paul T. Baker and Harsha Blumer and Keith E. Bohler and Adam Brazier and Paul R. Brook and Sarah Burke-Spolaor and Keeisi Caballero and Richard Camuccio and Rachel L. Chamberlain and Shami Chatterjee and James M. Cordes and Neil J. Cornish and Fronefield Crawford and H. Thankful Cromartie and Megan E. DeCesar and Paul B. Demorest and Timothy Dolch and J. A. Ellis and Robert D. Ferdman and Elizabeth C. Ferrara and William Fiore and Emmanuel Fonseca and Yhamil Garcia and Nathan Garver-Daniels and Peter A. Gentile and Deborah C. Good and Jordan A. Gusdorff and Daniel Halmrast and Jeffrey S. Hazboun and K. Islo and Ross J. Jennings and Cody Jessup and Megan L. Jones and Andrew R. Kaiser and David L. Kaplan and Luke Zoltan Kelley and Joey Shapiro Key and Michael T. Lam and T. Joseph W. Lazio and Duncan R. Lorimer and Jing Luo and Ryan S. Lynch and Dustin R. Madison and Kaleb Maraccini and Maura Mclaughlin and Chiara M. F. Mingarelli and Cherry Ng and Benjamin M. X. Nguyen and David J. Nice and Timothy T. Pennucci and Nihan S. Pol and Joshua Ramette and Scott M. Ransom and Paul S. Ray and Brent J. Shapiro-Albert and Xavier Siemens and Joseph Simon and Ren{\'e}e Spiewak and Ingrid H. Stairs and Daniel R. Stinebring and Kevin Stovall and Joseph K. Swiggum and Stephen R. Taylor and Michael Tripepi and Michele Vallisneri and Sarah J. Vigeland and Caitlin A. Witt and Weiwei Zhu},
  journal={The Astrophysical Journal Supplement Series},
We present time-of-arrival measurements and timing models of 47 millisecond pulsars (MSPs) observed from 2004 to 2017 at the Arecibo Observatory and the Green Bank Telescope by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). The observing cadence was three to four weeks for most pulsars over most of this time span, with weekly observations of six sources. These data were collected for use in low-frequency gravitational wave searches and for other astrophysical… 
A revisit of PSR J1909−3744 with 15-yr high-precision timing
We report on a high-precision timing analysis and an astrophysical study of the binary millisecond pulsar, PSR J1909$-$3744, motivated by the accumulation of data with well improved quality over the
Astrophysics Milestones for Pulsar Timing Array Gravitational-wave Detection
The NANOGrav Collaboration reported strong Bayesian evidence for a common-spectrum stochastic process in its 12.5 yr pulsar timing array data set, with median characteristic strain amplitude at
The NANOGrav 12.5 yr Data Set: Search for an Isotropic Stochastic Gravitational-wave Background
We search for an isotropic stochastic gravitational-wave background (GWB) in the $12.5$-year pulsar timing data set collected by the North American Nanohertz Observatory for Gravitational Waves
Bayesian search for gravitational wave bursts in pulsar timing array data
The nanohertz frequency band explored by pulsar timing arrays provides a unique discovery space for gravitational wave (GW) signals. In addition to signals from anticipated sources, such as those
PINT: A Modern Software Package for Pulsar Timing
PINT (PINT Is Not T empo3), a high-precision Python pulsar timing data analysis package, which is hosted on GitHub and available on the Python Package Index (PyPI) as pint-pulsar.
Measuring interstellar delays of PSR J0613−0200 over 7 yr, using the Large European Array for Pulsars
Using data from the Large European Array for Pulsars (LEAP), and the Effelsberg telescope, we study the scintillation parameters of the millisecond pulsar J0613-0200 over a 7 year timespan. The
Deconvolving Pulsar Signals with Cyclic Spectroscopy: A Systematic Evaluation
Radio pulsar signals are significantly perturbed by their propagation through the ionized interstellar medium. In addition to the frequency-dependent pulse times of arrival due to dispersion, pulse
The CHIME Pulsar Project: System Overview
The design, implementation, and performance of the digital pulsar observing system constructed for the Canadian Hydrogen Intensity Mapping Experiment (CHIME) are presented and the extensive science program enabled through the current modes of data acquisition for CHIME/Pulsar that centers on timing and searching experiments are discussed.
The NANOGrav 12.5-year Data Set: Search for Non-Einsteinian Polarization Modes in the Gravitational-wave Background
We search NANOGrav’s 12.5 yr data set for evidence of a gravitational-wave background (GWB) with all the spatial correlations allowed by general metric theories of gravity. We find no substantial
A gamma-ray pulsar timing array constrains the nanohertz gravitational wave background
After large galaxies merge, their central supermassive black holes are expected to form binary systems. Their orbital motion should generate a gravitational wave background (GWB) at nanohertz


The Parkes Pulsar Timing Array project: second data release
Abstract We describe 14 yr of public data from the Parkes Pulsar Timing Array (PPTA), an ongoing project that is producing precise measurements of pulse times of arrival from 26 millisecond pulsars
Very Long Baseline Astrometry of PSR J1012+5307 and its Implications on Alternative Theories of Gravity
PSR J1012+5307, a millisecond pulsar in orbit with a helium white dwarf (WD), has been timed with high precision for about 25 years. One of the main objectives of this long-term timing is to use the
Tests of General Relativity And Modified Gravity Using Pulsar Timing
In this report we aim to describe the most stringent tests of the strong equivalence principle, the fundamental principle of General Relativity, using pulsar timing. For this purpose, we first
Timing stability of three black widow pulsars
We study the timing stability of three black widow pulsars (BWPs), both in terms of their long-term spin evolution and their shorter term orbital stability. The erratic timing behaviour and radio
2013a, ArXiv e-prints
  • 2013
PINT: High-precision Pulsar Timing
  • 2019
libstempo: Python wrapper for Tempo2
  • 2020
PyPulse: PSRFITS handler
Tempo: Pulsar Timing Data
  • 2015
PSRCHIVE: Development
  • sp, Astrophysics Source Code Library,
  • 2011