Lens galaxy. Contours and gray image show the lens in the F160W band. The gray image shows the square root of the flux, to better show the details at large radii. The large blue circle has a radius of 4 arcsec and marks the extent of the of the visible baryons while the small black circle has a radius of 0.3 arcsec, roughly the radius of the Einstein Ring. The galaxy is at an angle of ≈ − 51° with respect to the north. The red ellipse represents an elliptical dark matter halo. It is inclined by an angle of ≈ − 56° and has an ellipticity of 0.4. The red dot near the center of the galaxy marks the position of the DM halo, that is slightly shifted in the NE direction by 0.23 ± 0.15 kpc with respect to the galaxy. This shift is discussed in Sect. 4.