to correct for the geometric distortion. The pixel scale of the combined image is 0025. A narrow ring-like star-forming region, ornamented with several bright knots, encircles nearly half the nucleus. We begin with creating two synthetic PSFs for each exposure using TinyTim. They are centered in the same position as the nucleus

in the HRC image to properly reproduce the geometric changes involved in the processing. During the modeling, we have also considered the dofocus offset ($\sim6~\mu$m) given by web-based model[^6]. The offset is mostly due to spacecraft breathing effects. The two TinyTim PSFs, still distorted, are almost identical except for slightly differences due to defocus offsets. We combined them with [astrodrizzle]{} in the same manner as the science images, producing a distortion-corrected PSF image.

We decompose the image using GALFIT with the region containing the star-forming ring masked out. Due to the small field of view of the ACS/HRC (26$\times$29), we cannot independently measure the sky background; we set it as a free parameter in the fit. Nor can be obtain any meaningful, independent constraint on the parameters of the disk. Our initial attempt to fit the image with a PSF + [Sérsic]{} + disk model failed to converge. 