Wideband timing of the Parkes Pulsar Timing Array UWL data
2022
Online
report
In 2018 an ultra-wide-bandwidth low-frequency (UWL) receiver was installed on the 64-m Parkes Radio Telescope enabling observations with an instantaneous frequency coverage from 704 to 4032 MHz. Here, we present the analysis of a three-year data set of 35 millisecond pulsars observed with the UWL by the Parkes Pulsar Timing Array (PPTA), using wideband timing methods. The two key differences compared to typical narrow-band methods are, firstly, generation of two-dimensional templates accounting for pulse shape evolution with frequency and, secondly, simultaneous measurements of the pulse time-of-arrival (ToA) and dispersion measure (DM). This is the first time that wideband timing has been applied to a uniform data set collected with a single large-fractional bandwidth receiver, for which such techniques were originally developed. As a result of our study, we present a set of profile evolution models and new timing solutions including initial noise analysis. Precision of our ToA and DM measurements is in the range of 0.005 $-$ 2.08 $\mu$s and (0.043$-$14.24)$\times10^{-4}$ cm$^{-3}$ pc, respectively, with 94% of the pulsars achieving a median ToA uncertainty of less than 1 $\mu$s.
Comment: 29 pages, 12 figures, Accepted for publication in ApJ
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Wideband timing of the Parkes Pulsar Timing Array UWL data
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Autor/in / Beteiligte Person: | Curyło, Małgorzata ; Pennucci, Timothy T. ; Bailes, Matthew ; Bhat, N. D. Ramesh ; Cameron, Andrew D. ; Dai, Shi ; Hobbs, George ; Kapur, Agastya ; Manchester, Richard N. ; Mandow, Rami ; Miles, Matthew T. ; Russell, Christopher J. ; Reardon, Daniel J. ; Shannon, Ryan M. ; Spiewak, Renée ; Zic, Andrew ; Zhu, Xing-Jiang |
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Veröffentlichung: | 2022 |
Medientyp: | report |
DOI: | 10.3847/1538-4357/aca535 |
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