RXTE Variability Study of the New X-ray Transient XTE J1859+226

Details RXTE Variability Study of the New X-ray Transient XTE J1859+226 RXTE Variability Study of the New X-ray Transient XTE J1859+226

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19512603m&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #126.03; Bulletin of the American Astronomical Society, Vol. 31, p.1555

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Scientific paper

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.

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