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

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arxiv 1910.11990 v1 pith:W5CRBMQW submitted 2019-10-26 astro-ph.HE

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

Lei Zhang , George Hobbs , Richard N. Manchester , Di Li , Pei Wang , Shi Dai , Jingbo Wang , Jane F. Kaczmarek
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Andrew D. Cameron Lawrence Toomey Weiwei Zhu Qijun Zhi Chenchen Miao Mao Yuan Songbo Zhang Zhenzhao Tao
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keywords pulsarsreceiversystemclustermeasurementsobservationsparkespolarization
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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.

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