Bayesian pulsar timing and noise analysis with Vela.jl: the wideband paradigm

Abstract: Vela.jl is a package for performing Bayesian pulsar timing & noise analysis written in Julia and Python. In the wideband paradigm of pulsar timing, simultaneous time of arrival and dispersion measure measurements are derived from a radio observation using frequency-resolved integrated pulse profiles and templates without splitting the observation into multiple frequency sub-bands. We describe the implementation of the wideband timing paradigm in Vela.jl, and demonstrate its usage using the NANOGrav 12.5-year wideband data of PSR J1923+2515. Vela.jl is the first software package to provide this functionality.