  Investigations that were carried out over the last two decades with novel and
more sensitive instrumentation have dramatically improved our knowledge of the
more violent physical processes taking place in galactic and extra-galactic
Black-Holes, Neutron Stars, Supernova Remnants/Pulsar Wind Nebulae, and other
regions of the Universe where relativistic acceleration processes are in place.
Simultaneous and/or combined observations with gamma-ray satellites and ground
based high-energy telescopes, have clarified the scenario of the mechanisms
responsible for high energy photon emission by leptonic and hadronic
accelerated particles in the presence of magnetic fields. Specifically, the
European Space Agency INTEGRAL soft gamma-ray observatory has detected more
than 1000 sources in the soft gamma-ray band, providing accurate positions,
light curves and time resolved spectral data for them. Space observations with
Fermi-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, at
the same time, provided evidence that a substantial fraction of the cosmic
sources detected are emitting in the keV to TeV band via Synchrotron-Inverse
Compton processes, in particular from stellar galactic BH systems as well as
from distant black holes. In this work, employing a spatial cross correlation
technique, we compare the INTEGRAL/IBIS and TeV all-sky data in search of
secure or likely associations. Although this analysis is based on a subset of
the INTEGRAL all-sky observations, we find that there is a significant
correlation: 39 objects show emission in both soft gamma-ray and TeV wavebands.
The full INTEGRAL database, now comprising almost 19 years of public data
available, will represent an important legacy that will be useful for the
Cherenkov Telescope Array (CTA) and other ground based large projects.
