UTMOST pulsar timing programme. I. Virtual Observatory Resource

Authors
  1. Jankowski F.
  2. Bailes M.
  3. Van Straten W.
  4. Keane E.F.
  5. Flynn C.
  6. Barr E.D.,Bateman T.
  7. Bhandari S.
  8. Caleb M.
  9. Campbell-Wilson D.
  10. Farah W.,Green A.J.
  11. Hunstead R.W.
  12. Jameson A.
  13. Oslowski S.
  14. Parthasarathy A.,Rosado P.A.
  15. Venkatraman Krishnan V.
  16. Published by
    CDS
Abstract

We present an overview and the first results from a large-scale pulsar timing programme that is part of the UTMOST project at the refurbished Molonglo Observatory Synthesis Radio Telescope (MOST) near Canberra, Australia. We currently observe more than 400 mainly bright southern radio pulsars with up to daily cadences. For 205 (8 in binaries, 4 millisecond pulsars), we publish updated timing models, together with their flux densities, flux density variability, and pulse widths at 843 MHz, derived from observations spanning between 1.4 and 3 yr. In comparison with the ATNF pulsar catalogue, we improve the precision of the rotational and astrometric parameters for 123 pulsars, for 47 by at least an order of magnitude. The time spans between our measurements and those in the literature are up to 48 yr, which allow us to investigate their long-term spin-down history and to estimate proper motions for 60 pulsars, of which 24 are newly determined and most are major improvements. The results are consistent with interferometric measurements from the literature. A model with two Gaussian components centred at 139 and 463km/s fits the transverse velocity distribution best. The pulse duty cycle distributions at 50 and 10 per cent maximum are best described by lognormal distributions with medians of 2.3 and 4.4 per cent, respectively. We discuss two pulsars that exhibit spin-down rate changes and drifting subpulses. Finally, we describe the autonomous observing system and the dynamic scheduler that has increased the observing efficiency by a factor of 2-3 in comparison with static scheduling.

Keywords
  1. pulsars
  2. radio-continuum-emission
  3. radio-sources
  4. astrometry
  5. ephemerides
  6. interferometry
  7. astronomical-models
  8. proper-motions
Bibliographic source Bibcode
2019MNRAS.484.3691J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/484/3691
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/484/3691
Document Object Identifer DOI
doi:10.26093/cds/vizier.74843691

Access

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/484/3691
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History

2020-02-05T14:48:55Z
Resource record created
2020-02-05T14:48:55Z
Created
2024-08-19T20:16:40Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr