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    • Galaxy clusters, voids and elliptical galaxies using the ROSAT PSPC 

      Carr, Michael (Trinity College (Dublin, Ireland). School of Physics, 2003)
      The ROSAT data archive contains of the order of 100,000 sources observed by the ROSAT PSPC (Position Sensitive Proportional Counter). For many sources detected with the ROSAT PSPC there is not a sufficient number of photons ...