AAS 206th Meeting, 29 May - 2 June 2005
Session 43 Pulsars, Neutron Stars and White Dwarfs
Poster, Wednesday, 10:00am-7:00pm, Thursday, 9:20am-2:00pm, June 1, 2005, Ballroom A

Previous   |   Session 43   |   Next

[43.03] Variability in Millisecond Pulsar Burst Oscillations

A. L. Watts (NASA GSFC / NRC), T. E. Strohmayer (NASA GSFC), C. B. Markwardt (NASA GSFC / UMD)

The accreting millisecond pulsar XTE J1814-338 exhibits oscillations at the known spin frequency during Type I X-ray bursts. The properties of the burst oscillations reflect the nature of the thermal asymmetry. We present an analysis of the variability of the burst oscillations of this source. We focus on three characteristics: fractional amplitude, harmonic content and frequency. Fractional amplitude and harmonic content constrain the size, shape and position of the emitting region, whilst variations in frequency indicate motion of the emitting region on the neutron star surface. We examine both long-term variability over the course of the outburst, and short-term variability during the bursts.

The author(s) of this abstract have provided an email address for comments about the abstract: anna@milkyway.gsfc.nasa.gov

Previous   |   Session 43   |   Next

Bulletin of the American Astronomical Society, 37 #2
© 2005. The American Astronomical Soceity.