SIMBAD references

We use Keck laser guide star adaptive optics imaging and exploit the magnifying effects of strong gravitational lensing (the effective resolution is FWHM ≈ 200 pc) to investigate the sub-kpc scale of an intermediate-redshift (z= 0.63), massive early-type galaxy being lensed by a foreground early-type galaxy; we dub this class of strong gravitational lens systems EELs, i.e. early-type/early-type lenses. We find that the background source is massive (M_*= 10^10.9 M_☉) and compact (r_e= 1.1 kpc), and a two-component fit is required to model accurately the surface brightness distribution, including an extended low-surface-brightness component. This extended component may arise from the evolution of higher redshift `red nuggets' or may already be in place at z ∼ 2 but is unobservable due to cosmological surface brightness dimming.