Muñoz-Darias, T., Martínez-Paris, I. G., Casares, J., Marsh, T. R., Cornelisse, R., Steeghs, D., Dhillon, V. S. and Charles, P. A. (2006) Multiband echo tomography of Sco X-1. Advances in space research, No.38 (Vol.12). pp. 2762-2764. doi:10.1016/j.asr.2005.10.056

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Abstract

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/Hell emission lines and a red continuum at lambda(c) similar to 6000 angstrom were obtained through narrow interference filters with ULTRACAM, and these were cross-correlated with simultaneous RXTE X-ray lightcurves. We find evidence for correlated variability, in particular when Sco X-1 enters the Flaring branch. The Bowen/Hell lightcurves lag the X-ray lightcurves with a light travel time which is consistent with reprocessing in the companion star while the continuum lightcurves have shorter delays consistent with reprocessing in the accretion disc.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH):	Double stars
Journal or Publication Title:	Advances in space research
Publisher:	Elsevier Science BV
ISSN:	0273-1177
Official Date:	2006
Dates:	Date Event 2006 Published
Volume:	No.38
Number:	Vol.12
Number of Pages:	3
Page Range:	pp. 2762-2764
DOI:	10.1016/j.asr.2005.10.056
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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