SIMBAD references

We investigated the morphology of the globular cluster system of the E5 galaxy NGC 720, and found it to resemble the ellipticity, position angle and surface density profile of the galactic light distribution, and to differ from the corresponding properties of the X-ray isophotes. The globular cluster system of NGC 720 can be considered as poor, with only a total of 660±190 clusters. We derive from the globular cluster luminosity function a distance of (m-M)=31.35±0.35mag or 18.6±2.2Mpc, leading to an absolute visual luminosity of M_V=-21.18±0.25mag and thus a low specific frequency of S=2.2±0.9, expected for an isolated galaxy.