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We investigate the globular cluster system of the isolated elliptical NGC7796, present new photometry of the galaxy, and use published kinematical datato constrain the dark matter content. Deep images in B and R, obtained with theVIsible MultiObject Spectrograph (VIMOS) at the VLT, form the data base. Wepresent isotropic and anisotropic Jeans-models and give a morphologicaldescription of the companion dwarf galaxy. The globular cluster system hasabout 2000 members, so it is not as rich as those of giant ellipticals ingalaxy clusters with a comparable stellar mass, but richer than many clustersystems of other isolated ellipticals. The colour distribution of GCs isbimodal, which does not necessarily mean a metallicity bimodality. Thekinematic literature data are somewhat inconclusive. The velocity dispersion inthe inner parts can be reproduced without dark matter under isotropy. Radiallyanisotropic models need a low stellar mass-to-light ratio, which would contrastwith the old age of the galaxy. A MONDian model is supported by X-ray analysisand previous dynamical modelling, but better data are necessary for aconfirmation. The dwarf companion galaxy NGC 7796-1 exhibits tidal tails,multiple nuclei, and very boxy isophotes. NGC 7796 is an old, massive isolatedelliptical galaxy with no indications of later major star formation events asseen frequently in other isolated ellipticals. Its relatively rich globularcluster system shows that isolation does not always mean a poor cluster system.The properties of the dwarf companion might indicate a dwarf-dwarf merger.(abridged)

Isolated elliptical galaxies and their globular cluster systems. II. NGC 7796 - globular clusters, dynamics, companion