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Low-frequency pulsar observations are crucial for understanding pulsar emission spectra and population physics, as well as for probing the interstellar medium (ISM) and Earth's ionosphere. We report the largest low-frequency pulsar census…

High Energy Astrophysical Phenomena · Physics 2026-04-01 Pratik Kumar , Marcin Sokolowski , Randall Wayth

Over the past several years, it has become apparent that some radio pulsars demonstrate significant variability in their single pulse amplitude distributions. The Rotating Radio Transients (RRATs), pulsars discovered through their single,…

Solar and Stellar Astrophysics · Physics 2015-03-19 E. F. Keane , M. A. McLaughlin , .

The first pulsar observations were made at Parkes on March 8, 1968, just 13 days after the publication of the discovery paper by Hewish and Bell. Since then, Parkes has become the world's most successful pulsar search machine, discovering…

Instrumentation and Methods for Astrophysics · Physics 2012-10-04 R. N. Manchester

Using two observations obtained with the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we present a detailed single-pulse analysis of the high-nulling pulsar PSR J1820-0509. We measure an exceptionally high nulling fraction…

High Energy Astrophysical Phenomena · Physics 2026-03-30 Zefeng Tu , Rushuang Zhao , Hui Liu , Biping Gong , D. Li , P. Wang , Chenchen Miao , Q. J. Zhi , S. J. Dang , S. D. Wang , Q. Zhou , Z. J. Zhang , Xu Zhu , R. W. Tian , H. W. Xu , Yi Zhou , D. Y. Yan

Timing of highly stable millisecond pulsars provides the possibility of independently verifying terrestrial time scales on intervals longer than a year. An ensemble pulsar time scale is constructed based on pulsar timing data obtained on…

Instrumentation and Methods for Astrophysics · Physics 2018-06-19 Alexander Rodin , Viktoriya Fedorova

With its relatively long observation time per pointing, the Parkes multibeam survey was effective in detecting nulling pulsars. We have made 2-hour observations of 23 pulsars which showed evidence for pulse nulling or mode changing in the…

Astrophysics · Physics 2008-11-26 N. Wang , R. N. Manchester , S. Johnston

We present the Turing Synthetic Radar Dataset, a comprehensive dataset to serve both as a benchmark for radar pulse deinterleaving research and as an enabler of new research methods. The dataset addresses the critical problem of separating…

Signal Processing · Electrical Eng. & Systems 2026-04-08 Edward Gunn , Adam Hosford , Robert Jones , Leo Zeitler , Ian Groves , Victoria Nockles

A number of pulsars are known to have profile evolution on timescales of months, often correlated with spin-down rate changes. Here, we present the first result from 3 years of monitoring observations from MeerKAT as part of the Thousand…

High Energy Astrophysical Phenomena · Physics 2024-02-15 A. Basu , P. Weltevrede , M. J. Keith , S. Johnston , A. Karastergiou , L. S. Oswald , B. Posselt , X. Song , A. D. Cameron

We discuss the possible source of a highly-dispersed radio transient discovered in the Parkes Multi-beam Pulsar Survey (PMPS). The pulse has a dispersion measure of $746\mathrm{cm}^{-3}\mathrm{pc}$, a peak flux density of 400 mJy for the…

Solar and Stellar Astrophysics · Physics 2015-06-05 E. F. Keane , B. W. Stappers , M. Kramer , A. G. Lyne

A small fraction of fast radio bursts (FRBs) have been observed with multiple bursts, whereas most Galactic sources emitting radio pulses are known to repeat. Here we present the results of follow-up observations of two FRBs and four…

High Energy Astrophysical Phenomena · Physics 2024-09-10 S. B. Zhang , X. Yang

We have discovered five millisecond pulsars (MSPs) in a survey of 14 unidentified Fermi-LAT sources in the southern sky using the Parkes radio telescope. PSRs J0101-6422, J1514-4946, and J1902-5105 reside in binaries, while PSRs J1658-5324…

In this work, we investigated the presence of strictly periodic, as well as quasi-periodic signals, in the timing of the 25 millisecond pulsars from the EPTA DR2 dataset. This is especially interesting in the context of the recent hints of…

Rotating radio transients (RRATs) are a sub-class of pulsars characterized by sporadic emission and thus can generally only be studied by analysis of their single-pulses. Here we present a single-pulse analysis using 11 years of timing data…

High Energy Astrophysical Phenomena · Physics 2018-10-26 Brent Shapiro-Albert , Maura McLaughlin , Evan Keane

Exploration of the time-domain radio sky has huge potential for advancing our knowledge of the dynamic universe. Past surveys have discovered large numbers of pulsars, rotating radio transients and other transient radio phenomena; however,…

Instrumentation and Methods for Astrophysics · Physics 2011-12-02 Benjamin R. Barsdell , Matthew Bailes , David G. Barnes , Christopher J. Fluke

The Parkes 20 cm Multibeam pulsar surveys have discovered nearly half of the known pulsars and revealed many distant pulsars with high dispersion measures. Using a sample of 1,301 pulsars from these surveys, we have explored the spatial…

High Energy Astrophysical Phenomena · Physics 2024-02-23 J. T. Xie , J. B. Wang , N. Wang , R. Manchester , G. Hobbs

High-sensitivity radio-frequency observations of millisecond pulsars usually show stochastic, broadband, pulse-shape variations intrinsic to the pulsar emission process. These variations induce jitter noise in pulsar timing observations;…

Millisecond pulsars are intrinsically very stable clocks and precise measurement of their observed pulse periods can be used to study a wide variety of astrophysical phenomena. In particular, observations of a large sample of millisecond…

High Energy Astrophysical Phenomena · Physics 2015-05-27 R. N. Manchester

The double pulsar system J0737-3039A/B, discovered with the Parkes radio telescope in 2003, is one of the most intriguing pulsar findings of the last decade. This binary system, with an orbital period of only 2.4-hr and with the…

Instrumentation and Methods for Astrophysics · Physics 2012-10-04 Marta Burgay

I conducted a new search for dispersed radio pulses from the X-ray pulsar PSR J0537$-$6910 in the Large Magellanic Cloud in a long (11.6 hr) archival 1.4 GHz Parkes search observation. I searched dispersion measures (DMs) between 0 and…

High Energy Astrophysical Phenomena · Physics 2024-06-10 Fronefield Crawford

Millisecond pulsars (MSPs) are known as highly stable celestial clocks. Nevertheless, recent studies have revealed the unstable nature of their integrated pulse profiles, which may limit the achievable pulsar timing precision. In this…

High Energy Astrophysical Phenomena · Physics 2015-06-24 K. Liu , R. Karuppusamy , K. J. Lee , B. W. Stappers , M. Kramer , R. Smits , M. B. Purver , G. H. Janssen , D. Perrodin
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