Echo Tomography of Sco X-1 using Bowen Fluorescence Lines

(2) Univ. of Southampton; 3); (3) SAAO; (4) Univ. of Warwick; (5) Univ. of Sheffield; (6) Harvard-Smithsonian Center for Astrophysics); D. Steeghs (6) ((1) Instituto de Astrofisica de Canarias; I.G. Martinez-Pais (1); J. Casares (1); P.A. Charles (2

arxiv: astro-ph/0503073 · v1 · pith:WHDJRM5Nnew · submitted 2005-03-03 · 🌌 astro-ph

Echo Tomography of Sco X-1 using Bowen Fluorescence Lines

J. Casares (1) , T. Mu\~noz-Darias (1) , I.G. Martinez-Pais (1) , R. Cornelisse (2) , P.A. Charles (2 , 3) , T.R. Marsh (4) , V.S. Dhillon (5)

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D. Steeghs (6) ((1) Instituto de Astrofisica de Canarias (2) Univ. of Southampton (3) SAAO (4) Univ. of Warwick (5) Univ. of Sheffield (6) Harvard-Smithsonian Center for Astrophysics)

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keywords lightcurvesbowenx-rayheiilinestimewerebranch

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We present preliminary results of a simultaneous X-ray/optical campaign of the prototypical LMXB Sco X-1 at 1-10 Hz time resolution. Lightcurves of the high excitation Bowen/HeII emission lines were obtained through narrow interference filters with ULTRACAM, and these were cross-correlated with X-ray lightcurves. We find evidence for correlated variability, in particular when Sco X-1 enters the Flaring Branch. The Bowen/HeII lightcurves lag the X-ray lightcurves with a light travel time which is consistent with reprocessing in the companion star.

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Echo Tomography of Sco X-1 using Bowen Fluorescence Lines

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