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Related papers: The Mode Switching in Pulsar J1326$-$6700

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Since their discovery more than 50 years ago, broadband radio studies of pulsars have generated a wealth of information about the underlying physics of radio emission. In order to gain some further insights into this elusive emission…

High Energy Astrophysical Phenomena · Physics 2021-07-21 K. M. Rajwade , B. B. P. Perera , B. W. Stappers , J. Roy , A. Karastergiou , J. M. Rankin

PSR J0922+0638 (B0919+06) shows unexplained anomalous variations in the on-pulse phase, where the pulse appears to episodically move to an earlier longitude for a few tens of rotations before reverting to the usual phase for approximately…

We report on single-pulse observations of the Galactic Center magnetar PSR J1745$-$2900 that were made using the Parkes 64-m radio telescope with a central frequency of 3.1 GHz at five observing epochs between 2013 July and August. The…

High Energy Astrophysical Phenomena · Physics 2018-02-23 W. M. Yan , N. Wang , R. N. Manchester , Z. G. Wen , J. P. Yuan

We report on radiation properties of extreme nulling pulsar J1502-5653, by analyzing the data acquired from the Parkes 64-m telescope at 1374 MHz. The radio emission from this pulsar exhibits sequences of several tens to several hundreds…

Solar and Stellar Astrophysics · Physics 2015-06-05 J. Li , A. Esamdin , R. N. Manchester , M. F. Qian , H. B. Niu

Sub-pulse drifting in pulsar radio emission is considered to be one of the most promising phenomenon for uncovering the underlying physical processes. Here we present a detailed study of such a phenomenon in observations of PSR…

High Energy Astrophysical Phenomena · Physics 2021-11-17 Parul Janagal , Manoneeta Chakraborty , N. D. Ramesh Bhat , Bhaswati Bhattacharya , Samuel J. McSweeney

We undertake the first targeted search at 1.5 GHz for radio emission from the variable $\gamma$-ray pulsar PSR J2021$+$4026. This radio-quiet pulsar assumes one of two stable $\gamma$-ray emission states, between which it transitions on a…

High Energy Astrophysical Phenomena · Physics 2023-05-24 B. Shaw , B. W. Stappers , P. Weltevrede , C. A. Jordan , M. B. Mickaliger , A. G. Lyne

Over the past decade it has become apparent that a class of `bursting pulsars' exist with the discovery of PSR J1752+2359 and PSR J1938+2213. In these pulsars, a sharp increase in the emission is observed that then tends to systematically…

Solar and Stellar Astrophysics · Physics 2014-02-10 Andrew Seymour , Duncan Lorimer , Josh Ridley

The multi-drifting subpulse behaviors in PSR J2007+0910 have been studied carefully with the high sensitivity observations of the Five-hundred-meter Aperture Spherical radio Telescope (FAST) at 1250 MHz. We found that there are at least six…

High Energy Astrophysical Phenomena · Physics 2023-11-07 Xin Xu , Lunhua Shang , Qijun Zhi , Shijun Dang , Shi Dai , Jie Tian , Yan Yu , Qingying Li , Shuo Xiao , Dandan Zhang

PSR B0919+06 generally radiates radio pulses in a normal phase range. It has been known for its occasional perplexing abnormal emission events wherein individual pulses come to an earlier phase range for a few tens of periods and then…

High Energy Astrophysical Phenomena · Physics 2016-01-13 Jun Han , J. L. Han , Ling-Xiang Peng , De-Yu Tang , Jun Wang , Jun-Qiang Li , Chen Wang , Ye-Zhao Yu , Bin Dong

Rotating Radio Transients (RRATs) are a class of pulsar-like objects characterized by intermittent radio emissions. Among them, RRATs that exhibit both RRAT and normal pulsar (NP) states may represent a key evolutionary stage from nulling…

High Energy Astrophysical Phenomena · Physics 2026-03-26 Xin Xu , Qijun Zhi , Jie Tian , Jiguang Lu , Peng Jiang , Shijun Dang , Renxin Xu , Juntao Bai , Ke Yang

We have analyzed the profile of the millisecond pulsar PSR J0437-4715 at 1440 MHz by fitting the Gaussians to pulse components, and identified its 11 emission components. We propose that they form a emission beam with 5 nested cones…

Astrophysics · Physics 2007-05-23 R. T. Gangadhara , R. M. C. Thomas

Here we report on observations of the radio magnetar PSR J1622-4950 at frequencies from 1.4 to 17 GHz. We show that although its flux density is varying up to a factor of ~10 within a few days, it has on average decreased by a factor of 2…

Transitional millisecond pulsars are an emerging class of sources that link low-mass X-ray binaries to millisecond radio pulsars in binary systems. These pulsars alternate between a radio pulsar state and an active low-luminosity X-ray disc…

We investigate the radio emission behaviour of PSR B0823+26, a pulsar which is known to undergo pulse nulling, using an 153-d intensive sequence of observations. The pulsar is found to exhibit both short (~min) and unusually long-term…

High Energy Astrophysical Phenomena · Physics 2015-06-11 N. J. Young , B. W. Stappers , P. Weltevrede , A. G. Lyne , M. Kramer

PSR J0742-2822 exhibits two distinct emission states that are identified by discrete changes in the observed pulse profile. These changes have previously been shown to correlate with changes in the derivative of the pulse frequency. In this…

Solar and Stellar Astrophysics · Physics 2015-06-15 M. J. Keith , R. M. Shannon , S. Johnston

PSR B0823+26, a 0.53-s radio pulsar, displays a host of emission phenomena over timescales of seconds to (at least) hours, including nulling, subpulse drifting, and mode-changing. Studying pulsars like PSR B0823+26 provides further insight…

Simultaneous observations of PSR B0823+26 with ESA's XMM-Newton, the Giant Metrewave Radio Telescope and international stations of the Low Frequency Array revealed synchronous X-ray/radio switching between a radio-bright (B) mode and a…

We report on the pulse-to-pulse energy distributions and phase-resolved modulation properties for catalogued pulsars in the southern High Time Resolution Universe intermediate-latitude survey. We selected the 315 pulsars detected in a…

We probe the properties of the transient X-ray pulsar MAXI J1409$-$619 through \textit{RXTE} and \textit{Swift} follow up observations of the outburst in 2010. We are able to phase connect the pulse arrival times for the 25 days episode…

High Energy Astrophysical Phenomena · Physics 2020-06-17 Ç. K. Dönmez , M. M. Serim , S. Ç. İnam , Ş. Şahiner , D. Çerri-Serim , A. Baykal

PSR J1825$-$0935 (PSR B1822$-$09) switches between radio-quiet (Q-mode) and radio-bright (B-mode) modes. The Q-mode is known to have a periodic fluctuation that modulates both the interpulse and the main pulse with the same period. Earlier…

High Energy Astrophysical Phenomena · Physics 2019-03-13 W. M. Yan , R. N. Manchester , N. Wang , J. P. Yuan , Z. G. Wen , K. J. Lee