In-depth investigation of one of the most evolved type Ia SNR in the LMC

We propose a deep observation of a type Ia SNR in the LMC, serendipitouslydiscovered at high offaxis angles in the XMMNewton survey of the LMC. Itappears to be one of the most evolved type Ia SNR. A deep onaxis observationwill provide key information in the study of type Ia SNe and their progenitors,and help us to understand the latest stage of a remnant. We will be able torefine the measurement of the mass of Fe present in the remnant, and probe theprogenitor.s circumstellar medium. Improved Xray images will enable the searchfor a surviving companion, and the study of the distribution of ejecta,revealing possible asymmetries of the SN explosion. Finally, a faint Xray shellcan be detected, providing measurement of, or limits on, the age of the remnant or ambient density. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]