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Investigations that were carried out over the last two decades with novel andmore sensitive instrumentation have dramatically improved our knowledge of themore violent physical processes taking place in galactic and extra-galacticBlack-Holes, Neutron Stars, Supernova Remnants/Pulsar Wind Nebulae, and otherregions of the Universe where relativistic acceleration processes are in place.Simultaneous and/or combined observations with gamma-ray satellites and groundbased high-energy telescopes, have clarified the scenario of the mechanismsresponsible for high energy photon emission by leptonic and hadronicaccelerated particles in the presence of magnetic fields. Specifically, theEuropean Space Agency INTEGRAL soft gamma-ray observatory has detected morethan 1000 sources in the soft gamma-ray band, providing accurate positions,light curves and time resolved spectral data for them. Space observations withFermi-LAT and observations that were carried out from the ground with H.E.S.S.,MAGIC, VERITAS, and other telescopes sensitive in the GeV-TeV domain have, atthe same time, provided evidence that a substantial fraction of the cosmicsources detected are emitting in the keV to TeV band via Synchrotron-InverseCompton processes, in particular from stellar galactic BH systems as well asfrom distant black holes. In this work, employing a spatial cross correlationtechnique, we compare the INTEGRAL/IBIS and TeV all-sky data in search ofsecure or likely associations. Although this analysis is based on a subset ofthe INTEGRAL all-sky observations, we find that there is a significantcorrelation: 39 objects show emission in both soft gamma-ray and TeV wavebands.The full INTEGRAL database, now comprising almost 19 years of public dataavailable, will represent an important legacy that will be useful for theCherenkov Telescope Array (CTA) and other ground based large projects.

INTEGRAL View of TeV Sources: A Legacy for the CTA Project