High time resolution optical/X-ray cross-correlations for X-ray binaries: anticorrelations and rapid variability
High time resolution optical/X-ray cross-correlations for X-ray binaries: anticorrelations and rapid variability
Using simultaneous observations in X-rays and optical, we have performed a homogeneous analysis of the cross-correlation behaviours of four X-ray binaries: SWIFT J1753.5−0127, GX 339−4, Sco X-1 and Cyg X-2. With high-time-resolution observations using ULTRACAM and RXTE, we concentrate on the short time-scale, δt < 20 s, variability in these …