Volume 402, Number 2, May I 2003
|Page(s)||647 - 652|
|Section||Stellar structure and evolution|
|Published online||14 April 2003|
Timing noise, glitches and the braking index of PSR B0540-69*
Istituto di Astrofisica Spaziale e Fisica Cosmica – Sezione di Palermo, CNR, via Ugo La Malfa 153, 90146 Palermo, Italy
2 Dipartimento di Fisica, Universitá La Sapienza, Piazzale A. Moro 2, 00185 Roma, Italy
3 Istituto di Astrofisica Spaziale e Fisica Cosmica – Sezione di Roma, CNR, Via del Fosso del Cavaliere, 00100 Roma, Italy
Corresponding author: G. Cusumano, firstname.lastname@example.org
Accepted: 9 January 2003
We report a pulse-time history of PSR B0540-69 based on the analysis of an extended data set including ASCA, BeppoSAX and RXTE observations spanning a time interval of about 8 years. This interval includes also the epoch of the glitch episode reported by Zhang et al. ([CITE]). Our analysis shows the presence of relevant timing noise and does not give clear evidence of the glitch occurrence. We performed an accurate evaluation of the main timing parameters, ν, and and derived a mean braking index of quite different from the lower value found by Zhang et al. ([CITE]), but in rather good agreement with several other values reported in the literature.
Key words: stars: pulsars: general / stars: pulsars: individual: PSR B0540-69 / X-rays: stars
© ESO, 2003
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