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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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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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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.