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PG 1407+265 is a radio quiet quasar but has a relativistic jet. In thisreport, we show some peculiar properties of its optical and X-ray emissions,which indicate their possible non-thermal origins produced from jet. We use asimple synchrotron + synchrotron self Compton (SSC) model to fit the emissionswith different ratios of energy densities between magnetic field and electrons(\eta=UB/Ue), which predict different {\gamma}-ray luminosity. The First LATAGN Catalog (1LAC) did not include PG 1407+265, which indicates an upper limitof {\gamma}-ray luminosity. This upper limit constrains the ratio unreasonablelarge (\eta>10^4-10^5). This inversely indicates that the optical and X-rayemissions may be not produced from the beaming jet. We discuss the physicalimplications of these results.

A puzzle of radio-quiet quasar PG 1407+265: are optical and X-ray emissions produced from relativistic jet?