Other
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..714..309r&link_type=abstract
X-RAY TIMING 2003: Rossie and Beyond. AIP Conference Proceedings, Volume 714, pp. 309-314 (2004).
Other
1
Pulsars, X-Ray
Scientific paper
We have analyzed 90 observations of the young pulsar B1509-58 made by RXTE over 7.6 years.
The pulse profile can be described as a combination of two systems. The first consists of two narrow components separated by 0.14 period with an amplitude ratio of 10:3; the second consists of a single broader component. The two systems appear to be shifting with respect to each other as a function of energy.
We have derived a single timing ephemeris on the basis of the X-ray observations, using terms up to the third derivative. There is no indication that a fourth derivative is required. The resulting value of the first braking index is consistent with that derived from radio observations, but the second braking index is twice its expected value. This casts some doubt on the significance of the pulsar's characteristic age (1700 years).
The phase residuals have been fit with sine components, resulting in an estimate of the proper motion (45+/-25 mas/yr at a position angle of 45+/-45°) and of masses and orbital radii (ranging from 0.7 to 2 AU and 0.25 to 2.5 earth masses) of planetary material - if that is the cause of these phase excursions.
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