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We report on observations of the unusual neutron-star binary system FIRST J102347.6+003841 carried out using the XMM-Newton satellite. This system consists of a radio millisecond pulsar in an 0.198-day orbit with a ~0.2 solar-mass…

We present analysis of the timing noise in PSR J1733-3716, which combines data from Parkes 64-m radio telescope and nearly 15 years of timing data obtained from the Nanshan 25-m radio telescope. The variations in the spin frequency and…

High Energy Astrophysical Phenomena · Physics 2020-11-06 Yue Hu , Lin li , J. P Yuan , S. J Dang , S. Q Wang , Z. J Wang , R. Yuen

We report on radio observations of four magnetars SGR 0501+4516, Swift 1834.9-0846, 1E 1841-045, SGR 1900+14 and a magnetar-like pulsar PSR J1846-0258 with the Five-hundred-meter Aperture Spherical radio Telescope (FAST) at 1250 MHz.…

High Energy Astrophysical Phenomena · Physics 2024-12-31 Juntao Bai , Na Wang , Shi Dai , Shuangqiang Wang , Jianping Yuan , Wenming Yan , Lunhua Shang , Xin Xu , Shijun Dang , Zhen Zhang

We report on our discovery of the radio pulsar, PSR J2016$+$3711, in supernova remnant (SNR) CTB 87, with a $\sim10.8\sigma$ significance of pulses, which confirms the compact nature of the X-ray point source in CTB 87. It is the first…

High Energy Astrophysical Phenomena · Physics 2024-02-02 Qian-Cheng Liu , Wen-Juan Zhong , Yang Chen , Pei Wang , Ping Zhou , You-Ling Yue , Di Li

In this study, we report on a detailed single pulse analysis of the radio emission from a rotating radio transient (RRAT) J1918$-$0449 which is the first RRAT discovered with the five hundred meter aperture spherical radio telescope (FAST).…

High Energy Astrophysical Phenomena · Physics 2022-07-27 J. L. Chen , Z. G. Wen , J. P. Yuan , N. Wang , D. Li , H. G. Wang , W. M. Yan , R. Yuen , P. Wang , Z. Wang , W. W. Zhu , J. R. Niu , C. C. Miao , M. Y. Xue , B. P. Gong

Integrated pulse profiles at 8.6~GHz obtained with the Shanghai Tian Ma Radio Telescope (TMRT) are presented for a sample of 26 pulsars. Mean flux densities and pulse width parameters of these pulsars are estimated. For eleven pulsars these…

We present a robust approach to incorporating models for the time-variable broadening of the pulse profile due to scattering in the ionized interstellar medium into profile-domain pulsar timing analysis. We use this approach to…

Instrumentation and Methods for Astrophysics · Physics 2017-04-12 L. Lentati , M. Kerr , S. Dai , R. M. Shannon , G. Hobbs , S. Oslowski

Magnetars are slowly rotating, highly magnetized young neutron stars that can show transient radio phenomena for radio pulses and fast radio bursts. We conducted radio observations of from two magnetars SGR$~$J1935+2154 and…

High Energy Astrophysical Phenomena · Physics 2025-02-03 Lang Xie , J. L. Han , Z. L. Yang , W. C. Jing , D. J. Zhou , W. Q. Su , Yi Yan , Tao Wang , N. N. Cai , P. F. Wang , Chen Wang

The analysis of individual pulses of four rotating radio transients (RRATs), previously discovered in a monitoring survey running for 5.5 years at the frequency of 111 MHz, is presented. At a time interval equivalent to five days of…

High Energy Astrophysical Phenomena · Physics 2022-03-24 S. A. Tyul'bashev , T. V. Smirnova , E. A. Brylyakova , M. A. Kitaeva

We report observed and derived timing parameters for three millisecond pulsars (MSPs) from observations collected with the Parkes 64-m telescope, Murriyang. The pulsars were found during re-processing of archival survey data by Mickaliger…

More than 100 rotating radio transients (RRATs) have been discovered since 2006. However, it is unclear whether RRATs radiate in the nulling states. PSR J0628+0909 has been classified as an RRAT. In this paper, we study the single pulses…

High Energy Astrophysical Phenomena · Physics 2022-12-12 J. A. Hsu , J. C. Jiang , H. Xu , K. J. Lee , R. X. Xu

We demonstrate that the sensitivity of high-precision pulsar timing experiments will be ultimately limited by the broadband intensity modulation that is intrinsic to the pulsar's stochastic radio signal. That is, as the peak flux of the…

Astrophysics of Galaxies · Physics 2011-09-23 Stefan Oslowski , Willem van Straten , George Hobbs , Matthew Bailes , Paul Demorest

Crust-superfluid coupling plays an important role in neutron star rotation, particularly with respect to timing noise and glitches. Here, we present new timing-noise-based estimates of the crust-superfluid coupling time-scale \(\tau\) for…

High Energy Astrophysical Phenomena · Physics 2026-02-03 Wenhao Dong , Andrew Melatos , Nicholas J. O'Neill , Patrick M. Meyers , Daniel K. Boek

The Low-Frequency Array radio telescope discovered the $707$ Hz binary millisecond pulsar (MSP) J0952$-$0607 in a targeted radio pulsation search of an unidentified $\textit{Fermi}$ gamma-ray source. This source shows a weak energy flux of…

Fast radio bursts (FRBs) are extragalactic radio transients of extraordinary luminosity. Studying the diverse temporal and spectral behaviour recently observed in a number of FRBs may help determine the nature of the entire class. For…

We report the discovery and the results of follow-up timing observations of PSR J2045+3633 and PSR J2053+4650, two binary pulsars found in the Northern High Time Resolution Universe pulsar survey being carried out with the Effelsberg radio…

The relativistic double neutron star binary PSR J0737-3039 shows clear evidence of orbital phase-dependent wind-companion interaction, both in radio and X-rays. In this paper we present the results of timing analysis of PSR J0737-3039…

High Energy Astrophysical Phenomena · Physics 2016-06-22 M. N. Iacolina , A. Pellizzoni , E. Egron , A. Possenti , R. Breton , M. Lyutikov , M. Kramer , M. Burgay , S. E. Motta , A. De Luca , A. Tiengo

The turbulent ionized interstellar medium diffracts radio waves and makes them propagate in multiple paths. The pulse-broadening observed at low frequencies results from the scattering effect of interstellar clouds of ionized gas. During…

High Energy Astrophysical Phenomena · Physics 2025-06-18 W. C. Jing , J. L. Han , C. Wang , P. F. Wang , T. Wang , N. N. Cai , J. Xu , Z. L. Yang , D. J. Zhou , Yi Yan , W. Q. Su , X. Y. Gao , L. Xie

The phenomenon of pulsar nulling, where pulsars temporarily and stochastically cease their radio emission, is thought to be indicative of a `dying' pulsar, where radio emission ceases entirely. Here we report the discovery of a long-period…

High Energy Astrophysical Phenomena · Physics 2024-05-30 G. Grover , N. D. R. Bhat , S. McSweeney , C. P. Lee , B. W. Meyers , C. M. Tan , S. S. Kudale

Double pulsar systems offer unrivaled advantages for the study of both astrophysics and fundamental physics. But only one has been visible: PSR J0737$-$3039; and its component pulsar B has now rotated out of sight due to the…

High Energy Astrophysical Phenomena · Physics 2025-09-17 Yuyang Wang , Joeri van Leeuwen