Timing analysis for 20 millisecond pulsars in the Parkes Pulsar Timing Array

D. J. Reardon, G. Hobbs, W Coles, Y. Levin, M J Keith, M. Bailes, N. D R Bhat, S Burke-Spolaor, S. Dai, M. Kerr, P. D. Lasky, R N Manchester, S Oslowski, Vikram Ravi, Ryan M Shannon, Willem van Straten, Lawrence Toomey, J. Wang, L Wen, X. P. YouX-J Zhu

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Abstract

We present timing models for 20 millisecond pulsars in the Parkes Pulsar Timing Array. The precision of the parameter measurements in these models has been improved over earlier results by using longer data sets and modelling the non-stationary noise. We describe a new noise modelling procedure and demonstrate its effectiveness using simulated data. Our methodology includes the addition of annual dispersion measure (DM) variations to the timing models of some pulsars. We present the first significant parallax measurements for PSRs J1024-0719, J1045-4509, J1600-3053, J1603-7202, and J1730-2304, as well as the first significant measurements of some post-Keplerian orbital parameters in six binary pulsars, caused by kinematic effects. Improved Shapiro delay measurements have resulted in much improved pulsar mass measurements, particularly for PSRs J0437-4715 and J1909-3744 with Mp = 1.44 ± 0.07 and 1.47 ± 0.03 M⊙, respectively. The improved orbital periodderivative measurement for PSR J0437-4715 results in a derived distance measurement at the 0.16 per cent level of precision, D = 156.79 ± 0.25 pc, one of the most fractionally precise distance measurements of any star to date.

Original languageEnglish
Pages (from-to)1751-1769
Number of pages19
JournalMonthly Notices of the Royal Astronomical Society
Volume455
Issue number2
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • Astrometry
  • Ephemerides
  • Parallaxes
  • Proper motions
  • Pulsars: general

Cite this

Reardon, D. J. ; Hobbs, G. ; Coles, W ; Levin, Y. ; Keith, M J ; Bailes, M. ; Bhat, N. D R ; Burke-Spolaor, S ; Dai, S. ; Kerr, M. ; Lasky, P. D. ; Manchester, R N ; Oslowski, S ; Ravi, Vikram ; Shannon, Ryan M ; van Straten, Willem ; Toomey, Lawrence ; Wang, J. ; Wen, L ; You, X. P. ; Zhu, X-J. / Timing analysis for 20 millisecond pulsars in the Parkes Pulsar Timing Array. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 455, No. 2. pp. 1751-1769.
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author = "Reardon, {D. J.} and G. Hobbs and W Coles and Y. Levin and Keith, {M J} and M. Bailes and Bhat, {N. D R} and S Burke-Spolaor and S. Dai and M. Kerr and Lasky, {P. D.} and Manchester, {R N} and S Oslowski and Vikram Ravi and Shannon, {Ryan M} and {van Straten}, Willem and Lawrence Toomey and J. Wang and L Wen and You, {X. P.} and X-J Zhu",
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Reardon, DJ, Hobbs, G, Coles, W, Levin, Y, Keith, MJ, Bailes, M, Bhat, NDR, Burke-Spolaor, S, Dai, S, Kerr, M, Lasky, PD, Manchester, RN, Oslowski, S, Ravi, V, Shannon, RM, van Straten, W, Toomey, L, Wang, J, Wen, L, You, XP & Zhu, X-J 2016, 'Timing analysis for 20 millisecond pulsars in the Parkes Pulsar Timing Array', Monthly Notices of the Royal Astronomical Society, vol. 455, no. 2, pp. 1751-1769. https://doi.org/10.1093/mnras/stv2395

Timing analysis for 20 millisecond pulsars in the Parkes Pulsar Timing Array. / Reardon, D. J.; Hobbs, G.; Coles, W; Levin, Y.; Keith, M J; Bailes, M.; Bhat, N. D R; Burke-Spolaor, S; Dai, S.; Kerr, M.; Lasky, P. D.; Manchester, R N; Oslowski, S; Ravi, Vikram; Shannon, Ryan M; van Straten, Willem; Toomey, Lawrence; Wang, J.; Wen, L; You, X. P.; Zhu, X-J.

In: Monthly Notices of the Royal Astronomical Society, Vol. 455, No. 2, 01.01.2016, p. 1751-1769.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Reardon, D. J.

AU - Hobbs, G.

AU - Coles, W

AU - Levin, Y.

AU - Keith, M J

AU - Bailes, M.

AU - Bhat, N. D R

AU - Burke-Spolaor, S

AU - Dai, S.

AU - Kerr, M.

AU - Lasky, P. D.

AU - Manchester, R N

AU - Oslowski, S

AU - Ravi, Vikram

AU - Shannon, Ryan M

AU - van Straten, Willem

AU - Toomey, Lawrence

AU - Wang, J.

AU - Wen, L

AU - You, X. P.

AU - Zhu, X-J

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N2 - We present timing models for 20 millisecond pulsars in the Parkes Pulsar Timing Array. The precision of the parameter measurements in these models has been improved over earlier results by using longer data sets and modelling the non-stationary noise. We describe a new noise modelling procedure and demonstrate its effectiveness using simulated data. Our methodology includes the addition of annual dispersion measure (DM) variations to the timing models of some pulsars. We present the first significant parallax measurements for PSRs J1024-0719, J1045-4509, J1600-3053, J1603-7202, and J1730-2304, as well as the first significant measurements of some post-Keplerian orbital parameters in six binary pulsars, caused by kinematic effects. Improved Shapiro delay measurements have resulted in much improved pulsar mass measurements, particularly for PSRs J0437-4715 and J1909-3744 with Mp = 1.44 ± 0.07 and 1.47 ± 0.03 M⊙, respectively. The improved orbital periodderivative measurement for PSR J0437-4715 results in a derived distance measurement at the 0.16 per cent level of precision, D = 156.79 ± 0.25 pc, one of the most fractionally precise distance measurements of any star to date.

AB - We present timing models for 20 millisecond pulsars in the Parkes Pulsar Timing Array. The precision of the parameter measurements in these models has been improved over earlier results by using longer data sets and modelling the non-stationary noise. We describe a new noise modelling procedure and demonstrate its effectiveness using simulated data. Our methodology includes the addition of annual dispersion measure (DM) variations to the timing models of some pulsars. We present the first significant parallax measurements for PSRs J1024-0719, J1045-4509, J1600-3053, J1603-7202, and J1730-2304, as well as the first significant measurements of some post-Keplerian orbital parameters in six binary pulsars, caused by kinematic effects. Improved Shapiro delay measurements have resulted in much improved pulsar mass measurements, particularly for PSRs J0437-4715 and J1909-3744 with Mp = 1.44 ± 0.07 and 1.47 ± 0.03 M⊙, respectively. The improved orbital periodderivative measurement for PSR J0437-4715 results in a derived distance measurement at the 0.16 per cent level of precision, D = 156.79 ± 0.25 pc, one of the most fractionally precise distance measurements of any star to date.

KW - Astrometry

KW - Ephemerides

KW - Parallaxes

KW - Proper motions

KW - Pulsars: general

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