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Gaussian process representation of dispersion measure noise in pulsar wideband datasets
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Gaussian process representation of dispersion measure noise in pulsar wideband datasets
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Gaussian process representation of dispersion measure noise in pulsar wideband datasets
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Paper
Gaussian process representation of dispersion measure noise in pulsar wideband datasets
2025
Overview
The ionized interstellar medium disperses pulsar radio signals, resulting in a stochastic time-variable delay known as the dispersion measure (DM) noise. In the wideband paradigm of pulsar timing, we measure a DM together with a time of arrival from a pulsar observation to handle frequency-dependent profile evolution, interstellar scintillation, and radio frequency interference more robustly, and to reduce data volumes. In this paper, we derive a method to incorporate arbitrary models of DM variation, including Gaussian process models, in pulsar timing and noise analysis and pulsar timing array analysis. This generalizes the existing method for handling DM noise in wideband datasets.
Publisher
Cornell University Library, arXiv.org
