Hugo, B.B.HugoBERNARDI, GianniGianniBERNARDISmirnov, O. M.O. M.SmirnovDALLACASA, DanieleDanieleDALLACASAVENTURI, TizianaTizianaVENTURIMURGIA, MATTEOMATTEOMURGIAPizzo, R. F.R. F.Pizzo2024-05-292024-05-2920230035-8711http://hdl.handle.net/20.500.12386/35143The Main galaxy cluster in the Abell 781 system is undergoing a significant merger and accretion process with peripheral emission to the north and south-eastern flanks of the merging structure. Here we present a full polarimetric study of this field, using radio interferometric data taken at 21 and 92 cm with the Westerbork Synthesis Radio Telescope (WSRT), to a sensitivity better than any 21 cm (L band) observation to date. We detect evidence of extended low-level emission of 1.9 mJy associated with the Main cluster at 21 cm, although this detection necessitates further follow-up by modern instruments due to the limited resolution of the WSRT. Our polarimetric study indicates that, most likely, the peripheral emission associated with this cluster is not a radio relic.STAMPAenArticle10.1093/mnras/stad28732-s2.0-85176954535https://academic.oup.com/mnras/article/526/4/5278/7281013https://api.elsevier.com/content/abstract/scopus_id/85176954535FIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation