The X-ray coolest gas in nearby cool core clusters

We propose to make deep RGS observations of three low redshift clusters in orderto make definitive statements about the range of temperature in the clusters andthe level and spatial distribution of cooling. All three clusters have coolcores, short central cooling times and central radio sources making bubbles. Thetargets all show FeXVII emission lines, and as they are nearby we are able tospatially resolve the innermost region where the feedback must originate. Theseobservations will exploit the unique capability of the RGS, and build on one ofXMM.s major discoveries. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]