Snapshots of strong lensing low mass clusters at intermediate redshift

Chandra and XMM are extending the minimum luminosity to which Xray clusters canbe detected and analyzed at intermediate redshifts, probing massescharacteristic of poor clusters. Strong lensing systems with image separationsin the range 616 are starting to be detected thus opening also with thistechnique a new window of exploration in this crucial mass range. Anunprecedented opportunity of Xraylensing comparison is therefore opening in anunexplored lower mass regime compared to the one of massive clusters. Therefore,we propose a snapshot survey of 5 promising strong lensing poor clusters tosecure their Xray fluxes. Deep followup exposures with Chandra will then beproposed for detailed analysis of the mass profile. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]