Adaptively smoothed full‐band Chandra image showing the A99 main ISOCAM sources (plus signs) and the A99 supplementary ISOCAM sources (crosses); the entire ISOCAM survey area is shown in this plot. ISOCAM sources with Chandra matches are boxed, and when available redshifts are given for these matches below the boxes. Matches with detections at 8.5 GHz are marked with "R" above the boxes. Note that six of the eight Chandra sources in the HDF‐N have ISOCAM matches and that most of these matches are also detected at 8.5 GHz. The adaptive smoothing is at the 3 σ level using the code of Ebeling et al. (2001).