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Using polarimetric radio profiles of 84 pulsars at a wavelength of 6 cm, we present a correlation between the polarization and characteristic age of pulsars. Considering the large error connected with the value of the characteristic age, we…

Astrophysics · Physics 2007-05-23 Alexis von Hoensbroech

Results of long time observations of the pulsar B0950+08 are given. These observations were carried out at the LPA radio telescope at the frequency of 111 MHz from January of 2016 to May of 2019 (450 days). A strong variability in emission…

High Energy Astrophysical Phenomena · Physics 2022-03-14 V. M. Malofeev , I. F. Malov , O. I. Malov , D. A. Teplykh

Over the past several years, it has become apparent that some radio pulsars demonstrate significant variability in their single pulse amplitude distributions. The Rotating Radio Transients (RRATs), pulsars discovered through their single,…

Solar and Stellar Astrophysics · Physics 2015-03-19 E. F. Keane , M. A. McLaughlin , .

We present a study of the spectral properties of 441 pulsars observed with the Parkes radio telescope near the centre frequencies of 728, 1382 and 3100 MHz. The observations at 728 and 3100 MHz were conducted simultaneously using the…

High Energy Astrophysical Phenomena · Physics 2018-03-30 F. Jankowski , W. van Straten , E. F. Keane , M. Bailes , E. Barr , S. Johnston , M. Kerr

Detecting and studying pulsars above a few GHz in the radio band is challenging due to the typical faintness of pulsar radio emission, their steep spectra, and the lack of observatories with sufficient sensitivity operating at high…

High Energy Astrophysical Phenomena · Physics 2018-06-29 Pablo Torne

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

The frequency dependence of pulse width is studied for 150 normal pulsars, mostly selected from the European Pulsar Network, for which the 10\% multifrequency pulse widths can be well fit with the Thorsett relationship…

High Energy Astrophysical Phenomena · Physics 2015-06-22 J. L. Chen , H. G. Wang

The Crab pulsar belongs to one of the most studied stellar objects in the sky. Since its accidental detection in 1968, its pulsed emission has been observed throughout most of the electromagnetic spectrum. Although currently one of more…

Solar and Stellar Astrophysics · Physics 2015-11-18 Natalia Lewandowska

The drift periods P2 and P3 were searched for using the summed power spectra of 41 pulsars observed at declinations from -9o to +42o. The power spectra of pulses with a given period, pulse width and drift behavior have been simulated, the…

High Energy Astrophysical Phenomena · Physics 2024-01-17 T. V. Smirnova , S. A. Tyul'bashev , M. A. Kitaeva , V. M. Malofeev

We report the discovery of a remarkable subpulse drift pattern in the relatively less studied wide profile pulsar, B0818-41, using high sensitivity GMRT observations. We find simultaneous occurrence of three drift regions with two different…

Astrophysics · Physics 2008-11-26 B. Bhattacharyya , Y. Gupta , J. Gil , M. Sendyk

Millisecond pulsars (MSPs) are known as highly stable celestial clocks. Nevertheless, recent studies have revealed the unstable nature of their integrated pulse profiles, which may limit the achievable pulsar timing precision. In this…

High Energy Astrophysical Phenomena · Physics 2015-06-24 K. Liu , R. Karuppusamy , K. J. Lee , B. W. Stappers , M. Kramer , R. Smits , M. B. Purver , G. H. Janssen , D. Perrodin

Pulsars are famed for their rotational clock-like stability and their highly-repeatable pulse shapes. However, it has long been known that there are unexplained deviations (often termed "timing noise") from the rate at which we predict…

Astrophysics of Galaxies · Physics 2010-06-29 Andrew Lyne , George Hobbs , Michael Kramer , Ingrid Stairs , Ben Stappers

We present a comprehensive analysis of the complex subpulse modulation patterns in PSR J1514-4834 (B1510-48) using L-band data from the Thousand-Pulsar-Array (TPA) programme, complemented with further MeerKAT UHF-band data. We demonstrate…

High Energy Astrophysical Phenomena · Physics 2025-02-21 J. A. Hsu , P. Weltevrede , G. Wright , M. J. Keith , L. S. Oswald , X. Song , H. Wang

Pulsars with periods more than 0.4 seconds in the declination range -9o < decj < 42o and in the right ascension range 0h < r.a.< 24h were searched in parallel with the program of interplanetary scintillations monitoring of a large number of…

We have made VLA images of the fields around three young pulsars which have resulted in the discovery of two new supernova remnants and confirmation of a third. We argue that, in at least two cases and perhaps the third, the pulsars are…

Astrophysics · Physics 2009-10-22 D. A. Frail , W. M. Goss , J. B. Z. Whiteoak

We use broadband sensitive LOFAR observations in the 25-80 MHz frequency range to study the single-pulse emission properties of the mode-switching pulsar B0943+10. We review the derivation of magnetospheric geometry, originally based on…

Solar and Stellar Astrophysics · Physics 2018-09-05 Anna Bilous

The analysis of radio emission of three new pulsars discovered at the Pushchino Radio Astronomy Observatory is presented. The detailed observations were carried out at a frequency of 111 MHz using the Large Phased Array (LPA) and the…

High Energy Astrophysical Phenomena · Physics 2022-06-27 Daria Teplykh , Valery Malofeev , Oleg Malov , Sergey Tyul'bashev

Measurements of pulsar flux densities are of great importance for understanding the pulsar emission mechanism and for predictions of pulsar survey yields and the pulsar population at large. Typically these flux densities are determined from…

Astrophysics of Galaxies · Physics 2015-08-26 M. Kuniyoshi , J. P. W. Verbiest , K. J. Lee , B. Adebahr , M. Kramer , A. Noutsos

At 327 MHz, the observed emission of PSR B1937+21 is greatly affected by scattering in the interstellar medium, on a timescale of order the pulse period. We use the bright impulsive giant pulses emitted by the pulsar to measure the impulse…

High Energy Astrophysical Phenomena · Physics 2024-04-09 Nikhil Mahajan , Marten H. van Kerkwijk

We present our results of pulse broadening time estimates and the study of the frequency scaling of this quantity for 60 pulsars based on actual multi-frequency scattering estimates. This research was based on our own measurements,…

Solar and Stellar Astrophysics · Physics 2015-06-23 Wojciech Lewandowski , Magdalena Kowalinska , Jaroslaw Kijak