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26 April 2024

» arxiv » 0709.3500

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Bowen blend echo-tomography of low mass X-ray binarie
T. Muñoz-Darias ; I. G. Martinez-Pais ; J. Casares ; R. Cornelisse ; V. S. Dhillon ; T. R. Marsh ; D. Steeghs ; K. O'Brien ; P. A. Charles ; M. Still ;
Date:	21 Sep 2007
Abstract:	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.
Source:	arXiv, 0709.3500
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