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

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

doi:10.1063/1.2896925

arXiv · 0709.3500

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

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

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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.

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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. 2007-09-21. Bowen blend echo-tomography of low mass X-ray binaries. https://doi.org/10.1063/1.2896925

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