Modelling TXS0506+056 with internal γ - γ secondaries

A flare in 2017 from TXS0506+056 has 3.5σ spatial as well as temporal correlation with IceCube-170922A neutrino event above energy 290 TeV. The multi-wavelength modeling of the source is one of the viable way to figure out its energetics to produce neutrino. Several models on considering lepto-hadronic channels to produce the gamma rays and neutrino from this blazar have already been done. We report here the secondary contribution resulted from the γ - γ → e+e- interaction between self synchrotron (SSC) and synchrotron photon in the blazar TXS0506+056. This study would help in understanding the maximum energy of the electrons produced at the source.