UV spectra with the E140M grating showing the continuum from 1200–1700 Å from the STIS observations. From top: day 23 (optical maximum, boxcar smoothed by 7 points), 105 (start of SSS emission, smoothed by 11 points), 173 (peak of SSS phase, smoothed by 7 points), 349 (end of SSS phase, smoothed by 15 points), 617 (smoothed by 21 points), and 834 (post-SSS, smoothed by 33 points). The last three dates did not include spectra longward of 1700 Å. See text for details. All fluxes are uncorrected absolute values, erg s^-1 cm^-2 Å^-1.