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We report on the detection of sporadic, strong single pulses co-existing with a periodic weak emission in the duration of weak mode of PSR B0826-34. The intensities and durations of these pulses are comparable with that of the sub-pulses in…

Solar and Stellar Astrophysics · Physics 2012-10-19 A. Esamdin , D. Abdurixit , R. N. Manchester , H. B. Niu

Using five year monitoring observations, we did a blind search for pulses for rotating radio transient (RRAT) J0139+33 and PSR B0320+39. At the interval \pm 1.5m of the time corresponding to the source passing through the meridian, we…

High Energy Astrophysical Phenomena · Physics 2021-04-07 E. A. Brylyakova , S. A. Tyul'bashev

We have conducted the Meterwavelength Single-pulse Polarimetric Emission Survey to study the radio emission properties of normal pulsars. A total of 123 pulsars with periods between 0.1 seconds and 8.5 seconds were observed in the survey at…

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 present the results of the most sensitive and comprehensive survey yet undertaken for radio pulsars and fast transients in the Andromeda galaxy (M31) and its satellites, using the Westerbork Synthesis Radio Telescope (WSRT) at a central…

High Energy Astrophysical Phenomena · Physics 2015-06-11 E. Rubio-Herrera , B. W. Stappers , J. W. T. Hessels , R. Braun

The search for rotating radio transients (RRAT) at declination from -9o to +42o was carried out in the semi-annual monitoring data obtained on the Large Phased Array (LPA) radio telescope at the frequency of 111 MHz. A neural network was…

High Energy Astrophysical Phenomena · Physics 2022-08-03 S. A. Tyul'bashev , D. V. Pervukhin , M. A. Kitaeva , G. E. Tyul'basheva , E. A. Brylyakova , A. V. Chernosov

Single pulses preserve information about the pulsar radio emission and propagation in the pulsar magnetosphere, and understanding the behaviour of their variability is essential for estimating the fundamental limit on the achievable pulsar…

High Energy Astrophysical Phenomena · Physics 2016-09-21 K. Liu , C. G. Bassa , G. H. Janssen , R. Karuppusamy , J. McKee , M. Kramer , K. J. Lee , D. Perrodin , M. Purver , S. Sanidas , R. Smits , B. W. Stappers , P. Weltevrede , W. W. Zhu

Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we have recorded 10^5 single pulses from PSR J1022+1001. We studied the polarization properties, their energy distribution and their times of arrival. This is only…

High Energy Astrophysical Phenomena · Physics 2022-02-23 Yi Feng , George Hobbs , Di Li , Shi Dai , Weiwei Zhu , Youling Yue , Pei Wang , Songbo Zhang , Lei Qian , Lei Zhang , Shuangqiang Wang , Chenchen Miao , Mao Yuan , Yongkun Zhang

Polarized radio emission of RRAT J1854+0306 is investigated with single pulses using Five-hundred-meter-Aperture Spherical Telescope. Its emission is characterized by nulls, narrow and weak pulses, and occasional wide and intense bursts…

High Energy Astrophysical Phenomena · Physics 2024-04-26 Qi Guo , Minzhi Kong , P. F. Wang , Y. Yan , D. J. Zhou

We present the first blind interferometric detection and imaging of a millisecond radio transient with an observation of transient pulsar J0628+0909. We developed a special observing mode of the Karl G. Jansky Very Large Array (VLA) to…

Astrophysics of Galaxies · Physics 2015-06-11 Casey J. Law , Geoffrey C. Bower , Martin Pokorny , Michael P. Rupen , Ken Sowinski

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

Pulsars are known to display short-term variability. Recently, examples of longer-term emission variability have emerged that are often correlated with changes in the rotational properties of the pulsar. To further illuminate this…

High Energy Astrophysical Phenomena · Physics 2016-01-27 P. R. Brook , A. Karastergiou , S. Johnston , M. Kerr , R. M. Shannon , S. J. Roberts

Recently several long-period radio transients have been discovered, with strongly polarised coherent radio pulses appearing on timescales between tens to thousands of seconds [1,2]. In some cases the radio pulses have been interpreted as…

We are currently undertaking a survey to search for new pulsars and the recently found Rotating RAdio Transcients (RRATs) in the Cygnus OB complex. The survey uses the Westerbrok Synthesis Radio Telescope (WSRT) in a unique way called the…

Astrophysics · Physics 2007-05-23 E. Rubio-Herrera , R. Braun , G. Janssen , J. van Leeuwen , B. W. Stappers

We report the discovery of PSR J0031$-$5726 in the GaLactic and Extragalactic All-sky MWA eXtended imaging survey at a Galactic latitude of $b \approx -60^\circ$. The pulsar exhibits both sporadic, extremely bright pulses reminiscent of…

The high-frequency radio sky is bursting with synchrotron transients from massive stellar explosions and accretion events, but the low-frequency radio sky has so far been quiet beyond the Galactic pulsar population and the long-term…

High Energy Astrophysical Phenomena · Physics 2025-03-12 N. Hurley-Walker , X. Zhang , A. Bahramian , S. J. McSweeney , T. N. O'Doherty , P. J. Hancock , J. S. Morgan , G. E. Anderson , G. H. Heald , T. J. Galvin

The emerging population of long-period radio transients (LPTs) show both similarities and differences with normal pulsars. A key difference is that their radio emission is too bright to be powered solely by rotational energy. Various models…

The RApid Temporal Survey (RATS) is a survey to detect objects whose optical intensity varies on timescales of less than ~70 min. In our pilot dataset taken with the INT and the Wide Field Camera in Nov 2003 we discovered nearly 50 new…

Astrophysics · Physics 2009-11-11 Gavin Ramsay , Ralf Napiwotzki , Pasi Hakala , Harry Lehto

We demonstrate that the high-magnetic field pulsar J1119-6127 exhibits three different types of behaviour in the radio band. Trailing the "normal" profile peak there is an "intermittent" peak and these components are flanked by two…

Solar and Stellar Astrophysics · Physics 2015-05-20 Patrick Weltevrede , Simon Johnston , Cristobal M. Espinoza

We report on observations of four southern Anomalous X-ray Pulsars, (1RXS J170849.0-400910, 1E 1048.1-5937, 1E 1841-045 and AX J1845-0258), obtained at 1.4 GHz using the Parkes radio telescope. Radio pulsations from these sources have been…

Astrophysics · Physics 2009-11-11 M. Burgay , N. Rea , G. L. Israel , A. Possenti , L. Burderi , T. Di Salvo , N. D'Amico , L. Stella