Kilo-hertz QPO and X-ray Bursts in 4U 1608-52 in Low Intensity State

Details Kilo-hertz QPO and X-ray Bursts in 4U 1608-52 in Low Intensity State Kilo-hertz QPO and X-ray Bursts in 4U 1608-52 in Low Intensity State

1997-10-07

arxiv.org/abs/astro-ph/9710069v2

Astronomy and Astrophysics

Astrophysics

5 pages,Latex, 6 figures, to appear in AIP conference proceedings of the 4th Compton Symposium

Scientific paper

10.1063/1.54145

We present the results from RXTE/PCA observations of 4U 1608-52 in its island state on March 15, 18 and 22 of 1996. Three type I X-ray bursts were detected in one RXTE orbit on March 22. We observed QPO features peaking at 567-800 Hz on March 15 and 22, with source fractional rms amplitude of 13%-17% and widths of 78-180 Hz in the power density spectra averaged over each spacecraft orbit. The rms amplitudes of these QPOs are positively correlated with the photon energy. The three X-ray bursts, with burst intervals of 16 and 8 minutes, have a duration of 16s. The blackbody emission region of the smallest X-ray burst among the three suggest it was a local nuclear burning. We also discuss a type I X-ray burst candidate in the observation.

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