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   82062
   We propose deep follow-up observations of two LMC remnants, N23 and DEM
   71, in order to complete a program to characterize their hard spectral
   emission and measure or set limits on their nonthermal X-ray
   luminosities. Existing observations are too brief (30 ks) to achieve
   these goals. The presence of a nonthermal spectral component could be
   the signature of acceleration of electrons within the shock to highly
   relativistic energy, and hence the creation of cosmic rays.
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