The Spectrum of the Magellanic Cloud Supernova Remnant 0454-67.2 in N9

The supernova remnant 045467.2 in the northwest wing of the Large MagellanicCloud is cooling and has faded to the point where most of the Xray emission isin lines of O and Fe below 1 keV. These energies and the remnant geometry arewell suited to the XMM RGS spectrometer, making it possible to get importantinformation from this lowluminosity object. We will measure the abundance andtemperature of O, Ne, and Fe in the central region and confirm (or not) the TypeIa identification. We will then use the measured line ratios to directlyestimate the ionization age of the remnant and, using the morphology measured byEPIC and by Chandra, calculate the mass of Fe in the central region. There mayalso be evidence for overionized plasma as in some .mixed morphology.remnants. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]