V3890 Sgr in 1990. The diamonds are for B-band magnitudes, the circles are for V-band magnitudes, and the large symbols are for the CCD magnitudes of Buckley et al. (1990). The general shape of the B-band template from 4 to 31 days after maximum is determined from the 1990 data, the B − V color around day 10 is determined by the CCD measures, and the peak of the B-band template is taken to be the V-band peak light curve with a constant offset. As such, any color evolution of the light curve near the peak could result in a peak B magnitude different from that quoted in the template.