ROSAT Timing of the LMC Pulsar 0540-69

Details ROSAT Timing of the LMC Pulsar 0540-69 ROSAT Timing of the LMC Pulsar 0540-69

1997-07-29

arxiv.org/abs/astro-ph/9707325v1

Astronomy and Astrophysics

Astrophysics

20 pages, incl. 4 figures

Scientific paper

10.1086/305072

We present a timing study of the young rotation-powered pulsar 0540-69 in the Large Magellanic Cloud, based on 130 kiloseconds of archival ROSAT data spanning a $\sim 3$-year period. We use ``$f- \dot f$'' techniques to measure the pulsar frequency as a function of frequency derivative at 17 independent epochs. From these measurements we derive a timing solution with a braking index $n = 2.5^{+0.6}_{-0.7}$, and we compare this solution to previous timing studies of 0540-69. Using this frequency-based solution, we create 27 pulse profiles and perform a time-of-arrival (TOA) analysis to investigate further the pulsar's timing behavior. While we can successfully fit smooth spin-down models to subsets of the TOAs spanning up to 2 years, we are unable to obtain acceptable phase-coherent fits to the entire 3-year set of TOAs. This behavior provides the first clear evidence for timing noise in 0540-69. We discuss the implications of these results for understanding previous studies of the timing behavior of 0540-69.

Affiliated with

Also associated with

No associations

Rating

ROSAT Timing of the LMC Pulsar 0540-69 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with ROSAT Timing of the LMC Pulsar 0540-69, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ROSAT Timing of the LMC Pulsar 0540-69 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-680009