DECam griz SED of the progenitor candidate as determined from the stack images. Horizontal error bars indicate the wavelength range of each filter. The dotted line is the best-fit blackbody function while the solid line is the best-fit stellar SED from Pickles (1998) corresponding to an A3V star with a temperature of 8790 K. The HST/WFPC2 F814W flux measurement obtained in 2001 is a factor of ≈1.9 (0.7 mag) brighter than the i-band DES DR2 tile image measurement. The model SEDs include Galactic extinction. Fluxes are scaled to a distance of 10 parsecs.