088310

SDSS-C4 3028 is a cluster of galaxies identified in the Sloan Digital Sky Survey. It stands out as a nearby cluster containing a surprisingly large fraction of star forming galaxies comma which is not fully understood in the standard model of galaxy evolution. It is also very unusual that the brightest galaxy of this cluster is a passive red spiral galaxy. We propose an XMM pointing that covers the entire cluster to determine its dynamical state and to obtain a more robust cluster mass measurement. We will also verify whether this passive red spiral galaxy is the brightest cluster galaxy residing at the the bottom of the gravitational potential of this cluster. SDSS-C4 3028 provides a valuable opportunity to study the evolutionary link between galaxies and clusters.