Revisiting wideband pulsar timing measurements

TL;DR

This paper introduces a new noise-aware method for wideband pulsar timing measurements, improving the accuracy of uncertainty estimates in pulsar timing data.

Contribution

A novel measurement technique that rigorously incorporates measurement noise, enhancing the reliability of wideband pulsar timing analyses.

Findings

More realistic uncertainty estimates with the new method

Improved measurement accuracy demonstrated on PSR J2124-3358

Validation using Indian Pulsar Timing Array data

Abstract

In the wideband paradigm of pulsar timing, the time of arrival of a pulsar pulse is measured simultaneously with the corresponding dispersion measure from a frequency-resolved integrated pulse profile. We present a new method for performing wideband measurements that rigorously accounts for measurement noise. We demonstrate this method using observations of PSR J2124$-$3358 made as part of the Indian Pulsar Timing Array experiment using the upgraded Giant Metre-wave Radio Telescope, and show that our method produces more realistic measurement uncertainty estimates compared to the existing wideband measurement method.