O'Sullivan, S. P.S. P.O'Sullivan0000-0003-1997-0771Bruggen, M.M.Bruggen0000-0002-2821-7928VAZZA, FRANCOFRANCOVAZZA0000-0002-3973-8403CARRETTI, ETTOREETTORECARRETTILocatelli, N. T.N. T.LocatelliStuardi, C.C.StuardiVACCA, VALENTINAVALENTINAVACCAVernstrom, T.T.VernstromHeald, G.G.HealdHorellou, C.C.HorellouShimwell, T. W.T. W.ShimwellHardcastle, M. J.M. J.HardcastleTasse, C.C.TasseRottgering, H.H.Rottgering2022-11-032022-11-032022http://hdl.handle.net/20.500.12386/32707Faraday rotation measure (RM) data for 349 pairs of radio source components with angular separations between 0.33 and 20-arcmin. The data presented here were obtained using the LOFAR Two-Metre Sky Survey (LoTSS), with a frequency range of 120 to 168MHz and a spectral resolution of 97.6kHz, between May 2014 and May 2020. The quoted RM errors are the nominal error calculated from the measurement noise and do not include systematic errors that would be relevant for comparison with other observations. The quoted RM errors are appropriate for the RM difference between close pairs, while for other applications we recommend adding a systematic uncertainty of approximately 0.05rad/m<SUP>2</SUP>. <P />(1 data file).enDatabasehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/26072022yCat..74952607OFIS/05 - ASTRONOMIA E ASTROFISICA