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Title

The High Time Resolution Universe Pulsar Survey I: system configuration and initial discoveries

Author(s)

Keith, M. J.;  Jameson, A.;  van Straten, W.;  Bailes, M.;  Johnston, S.;  Kramer, M.;  Possenti, A.;  Bates, S. D.;  Bhat, N. D. R.;  Burgay, M.;  Burke-Spolaor, S.;  D'Amico, N.;  Levin, L.;  McMahon, Peter L.;  Milia, S.;  Stappers, B. W.

Abstract

We have embarked on a survey for pulsars and fast transients using the 13-beam multibeam receiver on the Parkes Radio Telescope. Installation of a digital backend allows us to record 400 MHz of bandwidth for each beam, split into 1024 channels and sampled every 64 μs. Limits of the receiver package restrict us to a 340 MHz observing band centred at 1352 MHz. The factor of 8 improvement in frequency resolution over previous multibeam surveys allows us to probe deeper into the Galactic plane for short-duration signals such as the pulses from millisecond pulsars. We plan to survey the entire southern sky in 42 641 pointings, split into low, mid and high Galactic latitude regions, with integration times of 4200, 540 and 270 s, respectively. Simulations suggest that we will discover 400 pulsars, of which 75 will be millisecond pulsars. With 30 per cent of the mid-latitude survey complete, we have redetected 223 previously known pulsars and discovered 27 pulsars, five of which are millisecond pulsars. The newly discovered millisecond pulsars tend to have larger dispersion measures than those discovered in previous surveys, as expected from the improved time and frequency resolution of our instrument.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing

Source

Monthly Notices of the Royal Astronomical Society, Vol. 409, no. 2 (Dec 2010), pp. 619-627

Publication year

2010

FOR Code(s)

0201 Astronomical and Space Sciences

Keyword(s)

Pulsars

Publisher

Wiley-Blackwell Publishing

ISSN

0035-8711

Publisher URL

http://dx.doi.org/10.1111/j.1365-2966.2010.17325.x

Copyright

Copyright © 2010 The authors. Journal copyright © 2010 Royal Astronomical Society. The accepted manuscript of this paper is reproduced here in accordance with the copyright policy of the publisher. The definitive publication is available at www.interscience.wiley.com.

Full text

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