G296.8-0.3: A Mysterious Supernova Remnant in Crux

G296.80.3 is an unusual supernova remnant (SNR) in Crux. Radio observationshave revealed an intricate multipleshell structure with sharp radio filaments,and a peculiar strip running across its center. The Spitzer Space Telescope hasrevealed sharp infrared (IR) filaments at 24 microns matching synchrotron radiofilaments. The IR emission is most likely produced by dust immersed within thehot Xray emitting plasma. Little is known about G296.80.3, and the origin ofits peculiar morphology remains unexplained. We propose a spatiallyresolvedXray spectroscopy of G296.80.3 with the XMMNewton EPIC camera. We will deriveshock speeds, infer densities, pressures, and abundances in the Xray emittinggas, allowing us to learn about the true nature of this mysterious SNR. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]