News from the isolated ellipticals NGC 5812, NGC 7507, and NGC 7796
  We report on ongoing photometric and spectroscopic work on a sample of isolated elliptical galaxies. We investigate their globular cluster systems, and use the kinematics of globular clusters and the integrated galaxy light to constrain their dark halos, which are not found in the cases of NGC 5812 and NGC 7507 
Tom Richtler, Ricardo Salinas, Richard Lane, Michael Hilker, Juan   Pablo Caso, Lilia P. Bassino
astro-ph.GA