Time variability of the optical flux and X-ray properties of Mon-945 with panel layout and content as in Fig. 4. Contour levels in the C-stat space corresponding to the 68%, 90%, and 99% statistical confidence regions from the fit of the X-ray spectrum of Mon-945 observed during the intervals #3 (bottom left panel, black contours) and #5 (bottom right panel, black contours) are also shown. In both bottom panels the red contours are obtained from the average spectrum observed in #1+#2+#8+#9+#10. The cross marks the values obtained from the best fit.