Multiband echo tomography of Sco X-1

Bibcode
2006AdSpR..38.2762M
DOI
10.1016/j.asr.2005.10.056
Muñoz-Darias, T.; Martínez-Pais, I. G.; Casares, J.; Marsh, T. R.; Cornelisse, R.; Steeghs, D.; Dhillon, V. S.; Charles, P. A.
Bibliographical reference

Advances in Space Research, Volume 38, Issue 12, p. 2762-2764.

Advertised on:
1
2006
Journal
Advances in Space Research
Number of authors
8
IAC number of authors
3
Citations
2
Refereed citations
2
Description
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 and a red continuum at λc ˜ 6000 Å 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/HeII 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.
Type
Non-refereed

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