XMM-Newton observations of three newly discovered supernova remnants

We propose XMMNewton observations of three newly discovered supernova remnants.With the data we will be able to explore these objects in detail in the Xrayregime. We can measure their spectral characteristics (e.g., temperature,abundance), pinpoint details of their morphology and determine their expansionvelocity as well as estimate their age and distance. The proposed targetsG64.00.1 and G83.2+6.9 show radio shells. The southern target G312.4+4.8 has amatch both in the infrared and optical regime. By analyzing the three sources atthese wavelengths we were able to identify them as supernova remnants. Therequested XMMNewton data will therefore be of high r^ance to complement theobservations, which we performed at other wavelengths. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]