0740001

This proposal is the continuation of our accepted Targets of Opportunity (ToO) on Galactic Black Hole (BH) transients. They sources appear sporadically as X-ray Novae (XN) and display complex spectra and fast time-variability properties. Witnessing their spectro-timing evolutions hard tail and radio properties are crucial to get clues on the accretion/ejection processes occurring in their vicinity. One possible approach is to use INTEGRAL together with ground-based facilities operating in radio/optical/Infra-Red (IR) to study the evolutions and relations between disc Compton medium and jets. With an unprecedented high-energy sensitivity even in a crowded sky region INTEGRAL allow us to i) constrain thermal Comptonization vs hybrid models for the production of hard components ii) shed light on the nature of the additional parameter to the accretion rate suspected to drive state changes iii) correlate high-energy spectral behaviours with the properties of Quasi-Periodic Oscillations seen by RXTE for which we have accepted programs iv) probe the connection between accretion disc instabilities high-energy components and the formation of relativistic jets to find out whether radio IR optical non-thermal components and the gamma-ray events originate -as found in quasars- within the same shocked area downstream the relativistic jet. Our multiwavelength recent results (Cadolle Bel et al. 2007 2008 2009 Prat et al. 2009a) prove the importance and feasibility of such campaigns. Therefore in the framework of ToO observations we aim to analyze INTEGRAL data of up to two (new or known) BHXN simultaneously with our accepted ground-based programs we can trigger at any time as successfully performed in the past. [truncated! Please see actual data for full text]