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Fast radio bursts (FRBs) are brilliant short-duration flashes of radio emission originating at cosmological distances. The vast diversity in the properties of currently known FRBs, and the fleeting nature of these events make it difficult…

We observed the periodic radio transient GLEAM-X J162759.5-523504.3 (GLEAM-X J1627) using the Chandra X-ray Observatory for about 30-ks on January 22-23, 2022, simultaneously with radio observations from MWA, MeerKAT and ATCA. Its radio…

Rotating radio transients (RRATs) are neutron stars that emit detectable radio bursts sporadically. They are statistically distinct in the neutron star population, in many observable properties, but by their nature are practically difficult…

High Energy Astrophysical Phenomena · Physics 2023-09-21 D. J. McKenna , E. F. Keane , P. T. Gallagher , J. McCauley

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

We have carried out a detailed study of individual pulse emission from the pulsar J1741$-$0840 (B1738$-$08), observed using the Parkes and Effelsberg radio telescopes at the $L$ band. The pulsar exhibits four emission components which are…

High Energy Astrophysical Phenomena · Physics 2024-10-01 Yonghua Xu , Zhigang Wen , Jianping Yuan , Zhen Wang , Xuefeng Duan , Zhen Wang , Na Wang , Min Wang , Hongguang Wang , Abdujappar Rusul , Longfei Hao , Wei Han

Six years ago, the discovery of Rotating Radio Transients (RRATs) marked what appeared to be a new type of sparsely-emitting pulsar. Since 2006, more than 70 of these objects have been discovered in single-pulse searches of archival and new…

Solar and Stellar Astrophysics · Physics 2015-06-12 S. Burke-Spolaor

Coherent radio emission with properties similar to planetary auroral signals has been reported from GJ 1151, a quiescent, slow-rotating mid-M star, by the LOFAR Two-metre (120-170 MHz) Sky Survey (LoTSS). The observed {LOFAR} emission is…

A model for the main observational characteristics of the radio emission of pulsars with well organized drifting subpulses is presented. We propose that drifting subpulses result from the modulation of the radio emission mechanism due to…

Astrophysics · Physics 2009-11-10 G. Gogoberidze , G. Z. Machabeli , D. Melrose , Q. Luo

The rotating radio transients are sporadic pulsars which are difficult to detect through periodicity searches. By using a single-pulse search method, we can discover these sources, measure their periods, and determine timing solutions. Here…

Solar and Stellar Astrophysics · Physics 2012-11-06 Bingyi Cui , Jason Boyles , Maura McLaughlin , Nipuni Palliyaguru

Rotating radio transients (RRATs), loosely defined as objects that are discovered through only their single pulses, are sporadic pulsars that have a wide range of emission properties. For many of them, we must measure their periods and…

High Energy Astrophysical Phenomena · Physics 2017-09-04 B. -Y. Cui , J. Boyles , M. A. McLaughlin , N. Palliyaguru

A search for pulse signals in a area with declinations of $+52\degr <\delta <+55\degr$ was carried out on the LPA LPI radio telescope. When processing ten months of observations recorded in six frequency channels with a channel width of 415…

High Energy Astrophysical Phenomena · Physics 2023-09-06 V. A. Samodurov , S. A. Tyul'bashev , M. O. Toropov , A. V. Dolgushev , V. V. Oreshko , S. V. Logvinenko

A fraction of very low mass stars and brown dwarfs are known to be radio active, in some cases producing periodic pulses. Extensive studies of two such objects have also revealed optical periodic variability and the nature of this…

Solar and Stellar Astrophysics · Physics 2015-06-17 Leon K. Harding , Gregg Hallinan , Richard P. Boyle , Aaron Golden , Navtej Singh , Brendan Sheehan , Robert T. Zavala , Ray F. Butler

Searches for transient astrophysical sources often reveal unexpected classes of objects that are useful physical laboratories. In a recent survey for pulsars and fast transients we have uncovered four millisecond-duration radio transients…

Almost 50 years after radio pulsars were discovered in 1967, our understanding of these objects remains incomplete. On the one hand, within a few years it became clear that neutron star rotation gives rise to the extremely stable sequence…

High Energy Astrophysical Phenomena · Physics 2015-06-29 V. S. Beskin , S. V. Chernov , C. R. Gwinn , A. Tchekhovskoy

We have discovered 21 Rotating Radio Transients (RRATs) in data from the Green Bank Telescope (GBT) 350-MHz Drift-scan and the Green Bank North Celestial Cap pulsar surveys using a new candidate sifting algorithm. RRATs are pulsars with…

We report on timing, flux density, and polarimetric observations of the transient magnetar and 5.54 s radio pulsar XTE J1810-197 using the GBT, Nancay, and Parkes radio telescopes beginning in early 2006, until its sudden disappearance as a…

Solar and Stellar Astrophysics · Physics 2016-04-13 F. Camilo , S. M. Ransom , J. P. Halpern , J. A. J. Alford , I. Cognard , J. E. Reynolds , S. Johnston , J. Sarkissian , W. van Straten

We report on the discovery of consecutive bright radio pulses from the Vela pulsar, a new phenomenon that may lead to a greater understanding of the pulsar emission mechanism. This results from a total of 345 hr worth of observations of the…

High Energy Astrophysical Phenomena · Physics 2011-06-24 Jim L. Palfreyman , Aidan W. Hotan , John M. Dickey , Timothy G. Young , Claire E. Hotan

In the standard picture of radio pulsars, the radio emission arises from a set of open magnetic field lines, the extent of which is primarily determined by the pulsar's spin period, P, and the emission height. We have used a database of…

High Energy Astrophysical Phenomena · Physics 2019-02-20 Simon Johnston , Aris Karastergiou

We analyze the slow periodicities identified in burst sequences from FRB 121102 and FRB 180916 with periods of about 16 and 160 d, respectively, while also addressing the absence of any fast periodicity that might be associated with the…

High Energy Astrophysical Phenomena · Physics 2022-04-21 J. M. Cordes , I. Wasserman , Shami Chatterjee , Gauri Batra

As part of a survey for radio pulsars with the Parkes 64-m telescope we have discovered PSR J1622-4950, a pulsar with a 4.3-s rotation period. Follow-up observations show that the pulsar has the highest inferred surface magnetic field of…