The expected photon energy flux, resulting from the UHECR secondary electron synchrotron model a magnetised region with average magnetic field strength nG for RGB J0710+591 (left) and 1ES 1218+304 (right). Long-dashed lines show the spectrum that escapes from the magnetised region. Blue solid lines show the spectra with account of the attenuation by the EBL, for which the model of Kneiske & Dole (2008) has been considered.