DCF of the combined Whipple and MAGIC (“VHE”) light curve, correlated with the Swift/XRT (0.3–2 keV) light curve. The black error bars represent the uncertainties as derived from Edelson & Krolik (1988). The green lines represent the 1% and 99% extremes of the DCF distribution of simulated Swift/XRT light curves when correlated with the measured VHE light curve. The blue lines represent the 5% and 95% extremes.