Projected density profile of CLJ1001 (Wang et al. 2016). We fit a NFW profile to the radial stellar mass density. Green circles mark the projected stellar mass density, with the field level shown as a dashed black line. The red curve shows the best-fit NFW profile with uncertainty as the red shaded area, and the blue line indicates the derived virial radius (Goerdt et al. 2010) with uncertainty as the blue shaded area. The z_spec, fitted halo mass, and fitted concentration parameters are indicated in text. Upper limits are at 3σ significances.