The upper panels show radial surface brightness profiles of NGC 3627 made by fitting elliptical isophotes. The left panel shows a smaller FOV than the right panel. The solid (blue) line corresponds to HST F160W, the dotted (green) line to IRAC 3.6  μm, and the dashed (red) line to the IRAC 8  μm. The lower panels display the radial runs of ellipticity ϵ, position angle θ, and cos(4θ) terms in the ellipse fitting residuals. The adopted PA (178°, see Sect. 4.4) and the best-fit inclination (61.3°) are shown by dashed horizontal lines in the lower panels. The dashed vertical line shows a radius of 1 kpc (204).