SED of B2 1023+25, clearly showing its blazar nature. We do not have information on the extended structure, besides a flux of 32 mJy at 1.4 GHz, shown by the empty blue square in the radio band. The lobe is therefore only representative of a structure of 50 kpc in size, reprocessing 10% of the jet power, with magnetic field and relativistic electrons in equipartition. The set of parameters is listed in Tables 4 and 5.