Bowen blend echo-tomography of low mass X-ray binaries

Details Bowen blend echo-tomography of low mass X-ray binaries Bowen blend echo-tomography of low mass X-ray binaries

2007-09-21

arxiv.org/abs/0709.3500v1

AIPConf.Proc.984:15-22,2008

Astronomy and Astrophysics

Astrophysics

8 pages, 4 figures. To be published in the proceedings of "High Time Resolution Astrophysics", Edinburgh, 2007

Scientific paper

10.1063/1.2896925

We present simultaneous high time resolution (1-10 Hz) X-ray and optical observations of the persistent LMXBs Sco X-1 and V801 Ara(=4U 1636-536). In the case of Sco X-1 we find that the Bowen/HeII emission lags the X-ray light-curves with a light travel time of ~11-16s which is consistent with reprocessing in the donor star. We also present the detection of three correlated X-ray/optical bursts in V801 ara. Although this latter project is still in progress our preliminary results obtained by subtracting the Continuum light-curve from the Bowen/HeII data provide evidence of orbital phase dependent echoes from the companion star.

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