Top: spatial distribution of prestellar cores in L1688. The centroid positions, sizes, and position angles estimated with getsources for the prestellar and unbound cores in Table A.1 are represented by yellow ellipses overlaid on the Herschel high-resolution column density map derived from Herschel data (grayscale background image). Different colors are used for the separate dense clumps of L1688 (Oph A in blue, Oph B in orange, Oph C in green, Oph D in red, Oph E in purple, Oph F in brown, and Oph G in pink). Bottom: compared spatial distribution of prestellar cores (yellow squares) and unbound cores (blue circles) overlaid on the high resolution column-density map.