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Rotating Radio Transients (RRATs) are a new class of neutron stars discovered through the emission of radio bursts. Eleven sources are known up to now, but population studies predict these objects to be more numerous than the normal radio…

Astrophysics · Physics 2015-05-13 Nanda Rea

Pulses from 16 previously known rotating radio transients (RRAT) have been searched at the 110 MHz daily monitor program for 4 to 5.5 years by using the Large-Phased-Array (LPA) at Pushchino. The total number of pulses detected in such a…

High Energy Astrophysical Phenomena · Physics 2022-10-26 T. V. Smirnova , S. A. Tyul'bashev , E. A. Brylyakova , M. A. Kitaeva , I. V. Chashei , G. E. Tyul'basheva , V. V. Oreshko , S. V. Logvinenko

We have examined the interstellar scintillations of the pulsars in the double pulsar binary system. Near the time of the eclipse of pulsar A by the magnetosphere of B, the scintillations from both pulsars should be highly correlated because…

Astrophysics · Physics 2009-11-10 W. A. Coles , M. A. McLaughlin , B. J. Rickett , A. G. Lyne , N. D. R. Bhat

A search for pulsed radiation at a frequency of 111 MHz in the direction of 116 RRAT candidates was carried out. For the search, archival data obtained on a meridian 128-beam radio telescope, a Large Phased Array (LPA), was used. For each…

High Energy Astrophysical Phenomena · Physics 2024-01-11 S. A. Tyul'bashev , M. A. Kitaeva , E. A. Brylyakova , V. S. Tyul'bashev , G. E. Tyul'basheva

We present the search methods and initial results for transient radio signals in the High Time Resolution Universe (HTRU) Survey. The HTRU survey's single-pulse search, the software designed to perform the search, and a determination of the…

We have observed the relativistic binary pulsar PSR J1141$-$6545 over a period of $\sim$6 years using the Parkes 64 m radio telescope, with a focus on modelling the diffractive intensity scintillations to improve the accuracy of the…

High Energy Astrophysical Phenomena · Physics 2019-03-20 D. J. Reardon , W. A. Coles , G. Hobbs , S. Ord , M. Kerr , M. Bailes , N. D. R. Bhat , V. Venkatraman Krishnan

We present radio timing measurements of six rotating radio transient (RRAT) sources discovered in the Parkes Multibeam Pulsar Survey. These provide four new phase-connected timing solutions and two updated ones, making a total of seven of…

Solar and Stellar Astrophysics · Physics 2015-05-14 M. A. McLaughlin , A. G. Lyne , E. F. Keane , M. Kramer , J. J. Miller , D. R. Lorimer , R. N. Manchester , F. Camilo , I. H. Stairs

"Rotating RAdio Transients" (RRATs) are a newly discovered astronomical phenomenon, characterised by occasional brief radio bursts, with average intervals between bursts ranging from minutes to hours. The burst spacings allow identification…

We present a newly implemented single-pulse pipeline for the PALFA survey to efficiently identify single radio pulses from pulsars, Rotating Radio Transients (RRATs) and Fast Radio Bursts (FRBs). We have conducted a sensitivity analysis of…

Nearly all fast radio RRAT-type transients that are pulsars with rare pulses have been previously detected using decimetre wavelengths. We present here 34 transients detected at metre wavelengths in our daily monitoring at declinations -9o…

High Energy Astrophysical Phenomena · Physics 2018-10-17 Sergey A. Tyul'bashev , Vladislav S. Tyul'bashev , Valery M. Malofeev

We show that surface waves along interstellar current sheets closely aligned with the line of sight lead to pulsar scintillation properties consistent with those observed. This mechanism naturally produces the length and density scales of…

Astrophysics of Galaxies · Physics 2015-06-15 Ue-Li Pen , Yuri Levin

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…

Refractive scintillation effects are powerful techniques for discriminating between different models proposed for the electron density fluctuation spectrum in the ISM. Data from our long-term scintillation study of 18 pulsars in the DM…

Astrophysics · Physics 2009-10-31 N. D. Ramesh Bhat , Yashwant Gupta , A. Pramesh Rao

The interstellar medium scatters radio waves which causes pulsars to scintillate. For intrinsically short bursts of emission, the observed signal should be a direct measurement of the impulse response function. We show that this is indeed…

High Energy Astrophysical Phenomena · Physics 2017-05-24 Robert Main , Marten van Kerkwijk , Ue-Li Pen , Nikhil Mahajan , Keith Vanderlinde

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 derive the distribution of flux density of a compact source exhibiting strong diffractive scintillation. Our treatment accounts for arbitrary spectral averaging, spatially-extended source emission, and the possibility of intrinsic…

Instrumentation and Methods for Astrophysics · Physics 2012-08-09 Michael D. Johnson , Carl R. Gwinn

A small number of pulsars are known to emit giant pulses, single pulses much brighter than average. Among these is PSR J0534+2200, also known as the Crab pulsar, a young pulsar with high giant pulse rates. Long-term monitoring of the Crab…

We report on the first near-infrared observations obtained for Rotating RAdio Transients (RRATs). Using adaptive optics devices mounted on the ESO Very Large Telescope (VLT), we observed two objects of this class: RRAT J1819-1458, and RRAT…

Astrophysics of Galaxies · Physics 2015-05-18 N. Rea , G. Lo Curto , V. Testa , G. L. Israel , A. Possenti , M. McLaughlin , F. Camilo , B. M. Gaensler , M. Burgay

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

During the last few years there were discovered and deeply examined several transient neutron stars (Rotating Radio Transients). It is already well accepted that these objects are rotating neutron stars. But their extraordinary features…

Astrophysics · Physics 2007-09-14 D. Lomiashvili , G. Machabeli , I. Malov