Gamma‐ray Emission Mechanism in blazar 3C 279

Our recent study (Lindfors et al. 2006) shows that there is clear connection between synchrotron outbursts and gamma‐ray state in 3C 279, high gamma‐ray states occurring when synchrotron outbursts are in an early stage. However, the outburst is already beyond the broad line region (BLR) during the gamma‐ray flaring, which makes the External Compton mechanisms, where external photons originate from BLR, inefficient to reproduce the observed gamma‐ray emission. On the other hand, one‐zone or simple multi‐component SSC models (Lindfors et al. 2005) are not able to reproduce the observed gamma‐ray behaviour either. We discuss shortly other suggested mechanisms for gamma‐ray emission as well as future prospects to solve the question of gamma‐ray emission mechanism of 3C 279 via multiwavelength campaigns during the GLAST era.