H II regions detected in the central Antennae. Here, the color indicates the Lyman-continuum escape fraction f_esc, estimated bycomparing Hα luminosity and illuminating young star cluster(s). All colored regions have a positive escape fraction, other regions are filled light gray. The contours are the same broad-band levels as in Fig. 1, and the dashed dark-green line shows the approximate limit of the HST imaging.