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Related papers: The NANOGrav 11-year Data Set: Pulse Profile Varia…

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Analysis of 20 months of observations at the Parkes radio telescope shows secular changes in the pulsed emission from J0737-3039B, the 2.77 s pulsar of the double-pulsar system. Pulse profiles are becoming single-peaked in both bright…

We have analyzed 5.5 years of timing observations of 7 'slowly' rotating radio pulsars, made with the Westerbork Synthesis Radio Telescope. We present improved timing solutions and 30, mostly small, new glitches. Particularly interesting…

Astrophysics · Physics 2009-11-11 G. H. Janssen , B. W. Stappers

Many radio pulsars have stable pulse profiles, but some exhibit mode changing where the profile switches between two or more quasi-stable modes of emission. So far, these effects had only been seen in relatively slow pulsars, but we show…

High Energy Astrophysical Phenomena · Physics 2018-10-31 Nikhil Mahajan , Marten H. van Kerkwijk , Robert Main , Ue-Li Pen

PSR J1717-4054 is one of the small class of pulsars which null on intermediate (~hour) timescales. Such pulsars represent an important link between classical nullers, whose emission vanishes for a few rotations, and the intermittent pulsars…

Solar and Stellar Astrophysics · Physics 2015-06-22 Matthew Kerr , George Hobbs , Ryan Shannon , Mitchell Kiczynski , Robert Hollow , Simon Johnston

We present timing solutions for ten pulsars discovered in 350 MHz searches with the Green Bank Telescope. Nine of these were discovered in the Green Bank Northern Celestial Cap survey and one was discovered by students in the Pulsar Search…

Pulsars are famed for their rotational clock-like stability and their highly-repeatable pulse shapes. However, it has long been known that there are unexplained deviations (often termed "timing noise") from the rate at which we predict…

Astrophysics of Galaxies · Physics 2010-06-29 Andrew Lyne , George Hobbs , Michael Kramer , Ingrid Stairs , Ben Stappers

We present timing models for 20 millisecond pulsars in the Parkes Pulsar Timing Array. The precision of the parameter measurements in these models has been improved over earlier results by using longer data sets and modelling the…

It has long been thought that the pulsed X-ray properties of rotation-powered pulsars are stable on long time scales. However, long-term, systematic studies of individual sources have been lacking. Furthermore, dramatic X-ray variability…

High Energy Astrophysical Phenomena · Physics 2015-05-30 Margaret A. Livingstone , Victoria M. Kaspi

We present new results of timing and single pulse measurements for 18 radio pulsars discovered in 1993 - 1997 by the Penn State/NRL declination-strip survey conducted with the 305-m Arecibo telescope at 430 MHz. Long-term timing…

Astrophysics · Physics 2009-11-10 W. Lewandowski , A. Wolszczan , G. Feiler , M. Konacki , T. Soltysinski

Reprocessing of the Parkes Multibeam Pulsar Survey has resulted in the discovery of five previously unknown pulsars and several as-yet-unconfirmed candidates. PSR J0922-52 has a period of 9.68 ms and a DM of 122.4 pc cm^-3. PSR J1147-66 has…

We report the discovery of three pulsars whose large dispersion measures and angular proximity to \sgr indicate the existence of a Galactic center population of neutron stars. The relatively long periods (0.98 to 1.48 s) most likely reflect…

Solar and Stellar Astrophysics · Physics 2015-05-13 J. S. Deneva , J. M. Cordes , T. J. W. Lazio

Context. Pulsars have a very stable rotation. However, sudden increases in their rotation frequency known as glitches, perturb their evolution. While large glitches are commonly detected, small glitches are harder to detect because of the…

High Energy Astrophysical Phenomena · Physics 2024-06-26 E. Zubieta , F. Garcia , S. del Palacio , S. B. Araujo Furlan , G. Gancio , C. O. Lousto , J. A. Combi , C. M. Espinoza

We report the discovery of the millisecond pulsar PSR J2043+1711 in a search of a Fermi Large Area Telescope (LAT) source with no known associations, with the Nancay Radio Telescope. The new pulsar, confirmed with the Green Bank Telescope,…

We have searched 75 unidentified radio sources selected from the NRAO VLA Sky Survey (NVSS) catalog for the presence of rapidly spinning pulsars and short, dispersed radio bursts. The sources are radio bright, have no identifications or…

Solar and Stellar Astrophysics · Physics 2015-06-15 Deborah Schmidt , Fronefield Crawford , Glen Langston , Claire Gilpin

We present a 7 yr timing study of the 2.5 ms X-ray pulsar SAX J1808.4-3658, an X-ray transient with a recurrence time of ~2 yr, using data from the Rossi X-ray Timing Explorer covering 4 transient outbursts (1998-2005). We verify that the…

Pulsars are known to manifest complex phenomena, such as nulling, sub-pulse drifting, and periodicity. Within the purview of this investigation, we have harnessed the wavelet analysis technique to scrutinize the multifaceted periodicities…

High Energy Astrophysical Phenomena · Physics 2024-03-19 Peng-Fu Tian , Ping Zhang , Wen Yang , Wei Wang , Pei Wang

In our work, we analyse $5\times10^{4}$ single pulses from the recycled pulsar PSR J2222$-$0137 in one of its scintillation maxima observed by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). PSR J2222$-$0137 is one of the…

High Energy Astrophysical Phenomena · Physics 2023-10-24 X. L. Miao , W. W. Zhu , M. Kramer , P. C. C. Freire , L. Shao , M. Yuan , L. Q. Meng , Z. W. Wu , C. C. Miao , Y. J. Guo , D. J. Champion , E. Fonseca , J. M. Yao , M. Y. Xue , J. R. Niu , H. Hu , C. M. Zhang

We study statistical properties of stochastic variations in pulse arrival times, timing noise, in radio pulsars using a new analysis method applied in the time domain. The method proceeds in two steps. First, we subtract low-frequency…

High Energy Astrophysical Phenomena · Physics 2015-06-11 Steve Price , Bennett Link , Steve Shore , David Nice

Radio pulses from pulsars are affected by plasma dispersion, which results in a frequency-dependent propagation delay. Variations in the magnitude of this effect lead to an additional source of red noise in pulsar timing experiments,…