Studying Black Hole Transients in Outbursts from Radio to Gamma-rays

We request Target of Opportunity (ToO) observations to study a (new or known)Black Hole (BH) transient in two distinct spectral states (200 ks each or aminimum of a full orbit) simultaneously with two XMMNewton observations (10 kseach) and multiwavelength campaigns. BH transients sporadically appear anddisplay complex spectra and fast timevariability properties. Our goal is towitness their evolutions and connections to radio/Opt/NIR properties tounderstand the accretion/ejection processes. Using INTEGRAL simultaneously withXMMNewton and groundbased facilities, we aim to measure in detail the spectralvariations and correlate them with disc and jet evolutions. Such multiwavelengthobservations are the most fruitful way forward to constrain distinct models. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]