Stefania Carpano ESA XMM-Newton, Postdoc My research topic is the study of the X-ray population of nearby spiral galaxies, and in particular I have studied the population of the dwarf galaxy NGC300. About 90 sources are visible in the galaxy field. During my PhD thesis, I extracted some global properties for these sources, like their X-ray colors and flux. I also tried to classify the sources in several categories according mainly to their X-ray colors and informations from their optical/radio counterpart. A three color image of the galaxy and the corresponding color-color diagram can be found in the XMM-Newton image gallery. I also studied in more detail some of the brightest sources, trying to identify their nature and behaviour. As second research topic, I'm studying a cluster of galaxies, which is close to the field of NGC300. This cluster is very interesting because the conclusions from the optical survey are in contradiction with what is observed in X-rays. In optical wavelengths, there are two clusters which are embedded into two distinct haloes, and with two different redshifts. This suggests that the two clumps are in a pre-merging phase. On the other hand, in X-rays we see only one single halo centered in between the two clusters. An explanation of this, is that the two clumps have just crossed each other. We absolutely need an on-axis XMM-Newton observation of the cluster to be able to define its merging status.