Due to an error on the part of the author (Harvey Tananbaum) in his article "Nobel Days and Nights in Stockholm: From Black Holes to White Ties" published in Chandra News Issue 10 (March 2003), the data on Her X-1, Cyg X-3, and Cyg X-1 shown in Figure 21 and referred to in the associated text are incorrectly attributed to UHURU observations. As noted by Elihu Boldt, these data were obtained by Richard Rothschild et al. in a 1973 rocket-borne experiment carried out by the Goddard Space Flight Center X-ray astronomy group. The discoveries of rapid X-ray variability in Cen X-3, Her X-1, and Cyg X-1 described in the article are correctly credited to observations made with UHURU.