Density and brightness profiles of NGC 1835. Left panel: projected density profile of NGC 1835 obtained from star counts in concentric annuli around the cluster centre (empty circles). The horizontal dashed line marks the LMC field density that has been subtracted from the observed points to determine the background subtracted profile (filled circles). The solid red line represents the best-fit King model to the cluster density profile, and the red stripe outlines the range of ±1σ solutions. The vertical lines mark the locations of the core radius (dashed line), half-mass radius (dot-dashed line), and tidal radius (dotted line), with their respective 1σ uncertainties indicated with grey stripes. The values of the main structural parameters determined from the fitting process are also marked (see details in the main text). Right panel: same as in the left panel, but for the surface brightness profile of NGC 1835 in the F606W filter.