High Angular Resolution X-ray and Radio Observations of the Galactic Supernova Remnant G266.2-1.2 (RX J0852.0-4622) T.G. Pannuti, G. E. Allen, M.D. Filipovic, M. Stupar, P.A. Jones and J. W. Keohane G266.2-1.2: a Galactic supernova remnant with an X-ray spectrum dominated by non-thermal emission 75 kilosecond Chandra observation of luminous northwestern rim Fine structure in rim (leading and trailing edges) revealed for first time Estimate of maximum energy of cosmic-ray electrons accelerated along rim: E ≈ 40 TeV