0520035

We ask for up to 3 INTEGRAL TOO observations of one blazar in outburst for a total of 600 ks conditional to stringent triggering criteria based on X-ray or gamma-ray brightening as detected by the current high energy missions including INTEGRAL itself Swift/BAT and GLAST. Coordinated INTEGRAL and multiwavelength observations will guarantee the coverage of a broad energy range and allow us to follow the evolution of the overall spectral energy distribution during one or more flaring episodes. We will thus constrain the time-dependent parameters of the emission models. In particular we would like to test in detail the scenarioin which for a given bolometric energy injected into a jet at different epochs large flux variations are observed in individual frequency ranges depending on the size of the dissipation region. [truncated! Please see actual data for full text]