085039

TON 0599 is the flat spectrum radio quasar most recently detected in very high energy gamma rays. Analysis of the data taken during a flaring state revealed several interesting spectral featuresdoublePoint iclosePar apparent smooth spectral transition from the Fermi-LAT to MAGIC energy range comma iiclosePar inverse Compton openParICclosePar peak between Fermi-LAT and MAGIC energy ranges comma and iiiclosePar a spectral cut-off at few tens of GeV. Here we propose a monitoring campaign in order to study these spectral features in details. It will allow us to investigate the location of the gamma-ray emission region with respect to the broad line region and more detailed investigation of emission models. We also propose observations with XMM-Newton in order to investigate the transition from synchrotron to IC bump.