XMM Frontier Observation of the Pandora Cluster

We propose a deep XMM 100 ksec observation of the A2744 a unique massive clustermerger: the Pandora cluster. A2744 is the first of the six Frontier FieldClusters to be observed with HST, reaching unprecedented depth. With theproposed observation we will: 1) study the thermodynamic properties andmetallicity of the complex merging taking place in the cluster core; 2) comparethe lensing and hydrostatic mass estimates of the cluster and the different subclumps identified; 3) map the largescale matter distribution out to the virialradius where current data reveal possible substructure not yet confirmed thatmay contribute to the growth of the cluster. This data set will be of legacyvalue considering the HST Frontier Field initiative, we suggest to have no data proprietary right. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]