Wide Bandwidth Observations of Pulsars C, D and J in 47 Tucanae

TL;DR

This study presents the first wideband radio observations of pulsars C, D, and J in 47 Tucanae, providing detailed polarization profiles, flux measurements, and insights into their dispersion measures using the new UWL receiver system.

Contribution

It introduces the first wideband observations of these pulsars with the UWL system, enabling improved polarization, flux, and dispersion measure measurements.

Findings

Significant linear and circular polarization detected.

Precise dispersion measures obtained, with deviations noted for pulsar D.

Optimal frequency bands identified for future pulsar searches.

Abstract

We report the first wideband observations of pulsars C, D and J in the globular cluster 47Tucanae (NGC 104) using the Ultra-Wideband Low (UWL) receiver system recently installed on the Parkes 64 m radio telescope. The wide frequency range of the UWL receiver (704-4032 MHz), along with the well-calibrated system, allowed us to obtain flux density measurements and polarization pulse profiles. The mean pulse profiles have significant linear and circular polarization, allowing for determination of the Faraday rotation measure for each pulsar. Precise measurements of the dispersion measures show a significant deviation in the value for pulsar D compared to earlier results. Searches for new pulsars in the cluster are on-going and we have determined optimal bands for such searches using the Parkes UWL receiver system.