The INTEGRAL high energy sky and the MeV-GeV connection

After more than 6 years of operation, ESAs INTEGRAL Space Observatory has produced a wide number of results, ranging from the inventory of the high energy sources, depicting a gamma-ray sky populated by more than 700 high energy objects, to the discovery of the new class of Super Giant Fast X-ray Transient (SFXT) to dozens of variable galactic and extragalactic sources to the detection of the prompt emission from several tens of gamma ray bursts in the MeV range. In particular. INTEGRAL is continuing the deep observations of the Galactic Plane and, at a lower sensitivity, of the whole sky in the soft Gamma ray range reaching sensitivity better than 0.2 mCrab in the first case and better than typically 1 mCrab in the latter one. Finally, the new IBIS soft gamma-ray Survey catalogue will contain a substantially increased number of sources detected from 17 key up to several hundreds of key. A view of the INTEGRAL high energy sky will presented, with particular regard to sources emitting at high energy and their relation with the new AGILE, FERMI and ground based TeV results. (C) 2010 Elsevier B.V. All rights reserved.