RS Oph in 2006. The 2006 eruption has a well-defined light curve in the blue (diamonds) and visual (circles), with large symbols indicating either CCD measures or averages of 1 day or 3 days. Interestingly, there is a short-term dip in the light curve around day 210 (near the bottom of the post-eruption dip). From day 203 to day 220, RS Oph dimmed by about half a magnitude and then recovered its brightness. This dip has not been previously recognized and I know of no ready explanation.