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Related papers: Polarization Profiles of Globular Cluster Pulsars …

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We present integrated pulse profiles at 5~GHz for 71 pulsars, including eight millisecond pulsars (MSPs), obtained using the Shanghai Tian Ma Radio Telescope (TMRT). Mean flux densities and pulse widths are measured. For 19 normal pulsars…

High Energy Astrophysical Phenomena · Physics 2019-04-03 Ru-Shuang Zhao , Zhen Yan , Xin-Ji Wu , Zhi-Qiang Shen , R. N. Manchester , Jie Liu , Guo-Jun Qiao , Ren-Xin Xu , Ke-Jia Lee

We present strong observational evidence for a relationship between the direction of a pulsar's motion and its rotation axis. We show carefully calibrated polarization data for 25 pulsars, 20 of which display linearly polarized emission…

Astrophysics · Physics 2009-11-13 Simon Johnston , G. Hobbs , S. Vigeland , M. Kramer , J. M. Weisberg , A. G. Lyne

Radio pulsar B1933+16 is brightest core-radiation dominated pulsar in the Arecibo sky, and here we carry out a comprehensive high resolution polarimetric study of its radiation at both 1.5 and 4.6 GHz. At 1.5 GHz, the polarization is…

High Energy Astrophysical Phenomena · Physics 2016-07-27 Dipanjan Mitra , Joanna Rankin , Mihir Arjunwadkar

Interstellar scattering causes broadening and distortion to the mean pulse profiles and polarization position angle (PPA) curves, especially to the pulse profiles observed at lower frequency. This paper has implemented a method to recover…

High Energy Astrophysical Phenomena · Physics 2015-06-04 Abdujappar Rusul , Ali Esamdin , Alim Kerim , Dilnur Abdurixit , Hongguang Wang , Xiao-Ping Zheng

The second fastest millisecond pulsar, B1937+21, is one of several pulsars known to emit giant pulses (GPs). GPs are characterized by their huge energy, power-law cumulative energy distribution, and particular longitudes of occurrence. All…

Astrophysics · Physics 2007-05-23 V. I. Kondratiev , M. V. Popov , V. A. Soglasnov , Y. Y. Kovalev , N. Bartel , F. Ghigo

PSR B0818-41 is one of the few pulsars which show multiple drift regions having well defined phase relationship. In this paper we report new results from the multifrequency GMRT observations of this pulsar. Significant linear polarization…

Astrophysics · Physics 2015-05-13 Bhaswati Bhattacharyya , Yashwant Gupta , Janusz Gil

Giant pulses (GPs) occur in high magnetic-field millisecond pulsars (MSPs) and young Crab-like pulsars. Motivated by the fast radio bursts (FRBs) discovered in a globular cluster (GC) in the M81, we undertook baseband observations of PSR…

High Energy Astrophysical Phenomena · Physics 2025-06-19 Simon C. -C. Ho , Matthew Bailes , Chris Flynn , Federico Abbate

Full polarization measurements of 1665 and 1667-MHz OH masers at sites of massive star formation have been made with the Parkes 64-m radio telescope. Here we present the resulting spectra for 104 northerly sources. For more than 20 masers…

Astrophysics of Galaxies · Physics 2014-02-12 J. L. Caswell , J. A. Green , C. J. Phillips

The luminosity distribution of Galactic radio pulsars is believed to be log-normal in form. Applying this functional form to populations of pulsars in globular clusters, we employ Bayesian methods to explore constraints on the mean and…

Solar and Stellar Astrophysics · Physics 2015-06-11 Jayanth Chennamangalam , D. R. Lorimer , Ilya Mandel , Manjari Bagchi

POLAR is a dedicated Gamma-Ray Burst polarimeter making use of Compton-scattering which took data from the second Chinese spacelab, the Tiangong-2 from September 2016 to April 2017. It has a wide Field of View of $\sim6$ steradians and an…

High Energy Astrophysical Phenomena · Physics 2022-09-21 Hancheng Li , POLAR Collaboration

NGC 5024 (M53) is the most distant globular cluster (GC) with known pulsars. In this study, we report the discovery of a new binary millisecond pulsar PSR J1312+1810E (M53E) and present the new timing solutions for M53B to M53E, based on 22…

High Energy Astrophysical Phenomena · Physics 2023-07-19 Yujie Lian , Zhichen Pan , Haiyan Zhang , Paulo C. C. Freire , Shuo Cao , Lei Qian

We report the discovery and timing of two pulsars from a sample of four circularly polarized sources identified in radio continuum images taken as part of the Australian SKA Pathfinder (ASKAP) Variables and Slow Transients (VAST) survey.…

High Energy Astrophysical Phenomena · Physics 2026-03-17 Rahul Sengar , David L. Kaplan , Emil Lenc , Akash Anumarlapudi , Natasha Hurley-Walker , Ziteng Wang , Laura Driessen , Dougal Dobie , Tara Murphy

We describe images of the center of the dense globular cluster M15 (NGC 7078) obtained with the Hubble Space Telescope Wide Field and Planetary Camera 2 (WFPC2). Data taken in the F336W, F439W, and F555W filters (approximately U, B, and V)…

Astrophysics · Physics 2009-10-28 Puragra Guhathakurta , Brian Yanny , Donald P. Schneider , John N. Bahcall

We have developed a relativistic model for pulsar radio emission and polarization by taking into account of detailed geometry of emission region, rotation and modulation. The sparks activity on the polar cap leads to plasma columns in the…

High Energy Astrophysical Phenomena · Physics 2015-06-03 D. Kumar , R. T. Gangadhara

The high stellar density in the central parsecs around the Galactic Centre makes it a seemingly favourable environment for finding relativistic binary pulsars. These include pulsars orbiting other neutron stars, stellar-mass black holes or…

High Energy Astrophysical Phenomena · Physics 2021-08-25 R. P. Eatough , P. Torne , G. Desvignes , M. Kramer , R. Karuppusamy , B. Klein , L. G. Spitler , K. J. Lee , D. J. Champion , K. Liu , R. S. Wharton , L. Rezzolla , H. Falcke

The polarisation properties of the intrinsically small (< 20 kpc) radio sources are briefly discussed. At centimetric and decimetric wavelengths, substantial polarised emission is often detected in quasars and, at a lower level, in radio…

Astrophysics · Physics 2007-05-23 D. Dallacasa

We report the discovery of a highly circularly polarized, variable, steep-spectrum pulsar in the Australian Square Kilometre Array Pathfinder (ASKAP) Variables and Slow Transients (VAST) survey. The pulsar is located about $1^\circ$ from…

We have conducted a GPU accelerated reprocessing of $\sim 87\%$ of the archival data from the High Time Resolution Universe South Low Latitude (HTRU-S LowLat) pulsar survey by implementing a pulsar search pipeline that was previously used…

We have carried out observations of the newly-discovered magnetar in the direction of Sagittarius A* using the Australia Telescope Compact Array in four frequency bands from 4.5 to 20 GHz. Radio pulsations are clearly detected at all…

High Energy Astrophysical Phenomena · Physics 2015-06-15 Ryan M. Shannon , Simon Johnston

Aims: The ``bright'' High Frequency Peakers (HFPs) sample is a mixture of blazars and intrinsically small and young radio sources. We investigate the polarimetric characteristics of 45 High Frequency Peakers, from the ``bright'' HFP sample,…

Astrophysics · Physics 2009-11-13 M. Orienti , D. Dallacasa
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