RXTE Variability Study of the New X-ray Transient XTE J1859+226
Abstract
We present variability studies of a previously unknown X-ray transient, XTE J1859+226. The source was detected by the RXTE All Sky Monitor early on October 9, 1999, reached a relative maximum of approximately 1.5 Crab after 8 days, and began declining irregularly. RXTE PCA pointed observations commenced October 10.56. In a preliminary analysis of the source, a quasiperiodic oscillation was detected near the onset of the outburst, at a centroid frequency of 0.5 Hz, and with at least two harmonics. As the outburst proceeded the frequency of the QPO increased to at least 4 Hz. Further analysis of the power spectra and other timing properties will be presented, as will a comparison to the energy spectral characteristics throughout the evolution of the outburst.
- Publication:
-
American Astronomical Society Meeting Abstracts
- Pub Date:
- December 1999
- Bibcode:
- 1999AAS...19512603M