Hernández-García, L.L.Hernández-GarcíaVIETRI, GIUSTINAGIUSTINAVIETRIPANESSA, FrancescaFrancescaPANESSAPICONCELLI, EnricoEnricoPICONCELLIChavushyan, V.V.ChavushyanJiménez-Andrade, E. F.E. F.Jiménez-AndradeBASSANI, LOREDANALOREDANABASSANIBAZZANO, ANGELAANGELABAZZANOCazzoli, S.S.CazzoliMALIZIA, ANGELAANGELAMALIZIAMASETTI, NICOLANICOLAMASETTIMonaco, L.L.MonacoPović, M.M.PovićSaviane, I.I.SavianeUbertini, P.P.Ubertini2020-11-172020-11-1720180035-8711http://hdl.handle.net/20.500.12386/28380PBC J2333.9-2343 is a peculiar active nucleus with two giant radio lobes and a weak blazar-like nucleus at their centre. In this work we show new optical, ultraviolet (UV), and X-ray data taken from the San Pedro Mártir telescope, the New Technology Telescope, NTT/EFOSC2, and the Swift/XRT satellite. The source is highly variable at all frequencies, in particular the strongest variations are found in the broad Hα component with a flux increase of 61±4 per cent between 2009 and 2016, following the X-ray flux increase of 62±6 per cent between 2010 and 2016. We also detected a broad Hβ component in 2016, making the optical classification change from type 1.9 to type 1.8 in 1 yr. We have also detected a broad component of the [OIII]λ5007 line, which is blue-shifted and of high velocity, suggesting an origin from a highly disturbed medium, possibly an outflow. The line flux variability and broad widths are indicative of a jet that is, at least in part, responsible for the ionization of the broad line region (BLR) and narrow line region (NLR).STAMPAenArticle10.1093/mnras/sty13452-s2.0-85050824244000441288300024https://academic.oup.com/mnras/article/478/4/4634/49999382018MNRAS.478.4634HFIS/05 - ASTRONOMIA E ASTROFISICA