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We have used a combination of high resolution (HST ACS-HRC, ACS-WFC, andWFPC2) and wide-field (ESO-WFI) observations of the galactic globular clusterNGC 6388 to derive its center of gravity, projected density profile, andcentral surface brightness profile. While the overall projected profiles arewell fit by a King model with intermediate concentration (c=1.8) and sizablecore radius (rc=7"), a significant power law (with slope \alpha=-0.2) deviationfrom a flat core behavior has been detected within the inner 1 arcsecond. Theseproperties suggest the presence of a central intermediate mass black hole. Theobserved profiles are well reproduced by a multi-mass isotropic, sphericalmodel including a black hole with a mass of ~5.7x10^3 Msol.

The surface density profile of NGC 6388: a good candidate for harboring an intermediate-mass black hole