W
W. van Straten
Researcher at Auckland University of Technology
Publications - 218
Citations - 17460
W. van Straten is an academic researcher from Auckland University of Technology. The author has contributed to research in topics: Pulsar & Millisecond pulsar. The author has an hindex of 69, co-authored 204 publications receiving 15366 citations. Previous affiliations of W. van Straten include University of Sydney & Max Planck Society.
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Journal ArticleDOI
A Search for Sub-Millisecond Pulsars
Abstract: We have conducted a search of 19 southern Galactic globular clusters for sub-millisecond pulsars at 660 MHz with the Parkes 64-m radio telescope. To minimize dispersion smearing we used the CPSR baseband recorder, which samples the 20 MHz observing band at the Nyquist rate. By possessing a complete description of the signal we could synthesize an optimal filterbank in software, and in the case of globular clusters of known dispersion measure, much of the dispersion could be removed using coherent techniques. This allowed for very high time resolution (25.6 us in most cases), making our searches in general sensitive to sub-millisecond pulsars with flux densities greater than about 3 mJy at 50 cm. No new pulsars were discovered, placing important constraints on the proportion of pulsars with very short spin periods in these clusters.
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The low-frequency characteristics of PSR J0437-4715 observed with the Murchison Widefield Array
N. D. Ramesh Bhat,Stephen M. Ord,S. E. Tremblay,Steven Tingay,Avinash A. Deshpande,W. van Straten,S. I. Oronsaye,Gianni Bernardi,Judd D. Bowman,F. Briggs,Roger J. Cappallo,Brian E. Corey,D. Emerich,Robert F. Goeke,Lincoln J. Greenhill,Bryna J. Hazelton,Jacqueline N. Hewitt,Melanie Johnston-Hollitt,David L. Kaplan,Justin C. Kasper,Eric Kratzenberg,C. J. Lonsdale,M. J. Lynch,Stephen R. McWhirter,Daniel A. Mitchell,Miguel F. Morales,Edward H. Morgan,Divya Oberoi,Thayagaraja Prabu,Alan E. E. Rogers,D. A. Roshi,N. Udaya-Shankar,K. S. Srivani,R. Subramanyan,M. Waterson,Randall B. Wayth,Rachel L. Webster,Alan R. Whitney,Anne-Marie Williams,C. L. Wiliams +39 more
TL;DR: In this article, the Murchison Widefield Array (MWA) was used to detect the millisecond pulsar PSR J0437-4715 at a frequency of 192 MHz.
Journal ArticleDOI
The High Time Resolution Universe Pulsar Survey - XVI. Discovery and timing of 40 pulsars from the southern Galactic plane.
A. D. Cameron,A. D. Cameron,D. J. Champion,Matthew Bailes,Vishnu Balakrishnan,Ewan Barr,Ewan Barr,C. G. Bassa,Samuel Bates,Shivani Bhandari,N. D. R. Bhat,M. Burgay,Sarah Burke-Spolaor,Chris Flynn,Andrew Jameson,Simon Johnston,Michael Keith,Michael Kramer,Michael Kramer,Lina Levin,Andrew Lyne,Cherry Ng,E. Petroff,A. Possenti,A. Possenti,David A. Smith,Benjamin Stappers,W. van Straten,Caterina Tiburzi,Caterina Tiburzi,Jingwen Wu +30 more
TL;DR: In this paper, the authors present the results of processing an additional 44% of the High Time Resolution Universe South Low Latitude (HTRU-S LowLat) pulsar survey, and report the discovery of 40 pulsars, including three millisecond pulsar-white dwarf binary systems (PSRs J1537-5312, J1547-5709 and J1618-4624), a black-widow binary system (PSR J1745-23), a glitching pulsar, an eclipsing binary pulsar with a 1.5
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Radio Astronomical Polarimetry and Phase-coherent Matrix Convolution
TL;DR: In this article, a phase-coherent technique for the calibration of polarimetric data is presented, where data are multiplied by the response function in the frequency domain, and the system response can be corrected with arbitrarily high spectral resolution, effectively treating the problem of bandwidth depolarization.
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A neutral hydrogen distance limit to the relativistic binary PSR J1141-6545
TL;DR: In this paper, the authors obtained an HI absorption spectrum of the relativistic binary PSR J1141-6545 and used it to constrain the distance to the system.