Probing the X-ray Variability of Neutron Star LMXBs: the Case of the Brightest Source Sco X-1

Details Probing the X-ray Variability of Neutron Star LMXBs: the Case of the Brightest Source Sco X-1 Probing the X-ray Variability of Neutron Star LMXBs: the Case of the Brightest Source Sco X-1

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aipc..714..387y&link_type=abstract

X-RAY TIMING 2003: Rossie and Beyond. AIP Conference Proceedings, Volume 714, pp. 387-390 (2004).

Computer Science

X-Ray, Neutron Stars, X- And Gamma-Ray Telescopes And Instrumentation

Scientific paper

We have investigated the X-ray variability of Sco X-1 on its normal branch when several simultaneous noise components and quasi-periodic oscillations (QPOs) are observed with the Rossi X-ray Timing Explorer (RXTE). The upper kHz QPO frequency is anti-correlated with the X-ray flux on the time scales of the very low frequency noise (VLFN) and the normal branch oscillation (NBO), while the lower kHz QPO strength seems anti-correlated with the NBO flux, opposite to that of the horizontal branch oscillation (HBO). We summarize the overall picture of decomposing the X-ray variability of Sco X-1 on its normal branch into these noise components and QPOs, and discuss the consequences for the X-ray variability models.

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