  Shell galaxies are considered the debris of recent accretion/merging
episodes. Their high frequency in low density environments suggest that such
episodes could drive the secular evolution for at least some fraction of the
early-type galaxy population. We present here the preliminary results of
ultraviolet and X-ray data for a sample of three shell galaxies, namely NGC
474, NGC 7070A and ESO 2400100. The Far UV morphology and photometry are
derived using the observations obtained with the Galaxy Evolution Explorer and
the XMM- Newton Optical Monitor. We aim at investigating the rejuvenation
processes in the stellar population using the UV information as well as at
gaining information about the possible evolution with time of the X-ray
emission due interaction/merging processes.
