XMM-Newton Proposal 03005401

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Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, G182.4+4.3-E, Xmm-Newton Proposal 03005401

Scientific paper

We propose 3 brief EPIC observations of regions of the evolved shell-like SNR G182.4+4.3. This SNR has attributes similar to those of an emerging subclass of SNRs. These other remnants, RX J1713.3-3946, RX J0852.0-4622, and SN1006, all have low X-ray and radio surface brightness with strong morphological overlap. All are expanding into very low density media. Their X-ray emission is dominated by synchrotron radiation from shock accelerated electrons, and they thus serve as laboratories for cosmic ray acceleration studies. SNR G182.4+4.3, still undetected in X-rays, is older than these others and therefore allows study of the evolution of shock acceleration in SNRs. EPIC observations allow us to map the X-ray emission and determine spectrally the mechanism(s) responsible.

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