XMM Observations of X-Ray Emission from Supernovae

The interaction of a supernova (SN) with circumstellar gas gives radiationpredominantly in the Xray range. We propose to make spectral and imagingobservations of a small number of young SNe. By comparing the spectra withmodels for the shock emission, developed by the group, the temperature of theemitting gas, and hence the shock velocity, can be determined. From the lowenergy cutoff it can be decided whether the shock is radiative or adiabatic.The abundances in the shocked gas reflect whether the reverse shock is in thehydrogen, helium or oxygen rich regions of the SN ejecta. The requestedobservations, together with our optical, radio and UV data, are henceindispensable to get a detailed picture of both the SN ejecta, shock wave,and truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]