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19 April 2024 |
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Multiband Echo Tomography of Sco X-1 | | T. Mu~noz-Darias
; I. G. Martínez-Pais
; J. Casares
; T. R. Marsh
; R. Cornelisse
; D. Steeghs
; V.S. Dhillon
; P. A. Charles
; | | Date: |
4 Jul 2005 | | Subject: | astro-ph | | 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/HeII emission lines and a red continuum at lambda ~ 6000 Ang 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 | | Source: | arXiv, astro-ph/0507066 | | Services: | Forum | Review | PDF | Favorites | |
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