2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/174717So far the lens J1131-1231 has been studied only at optical and X-ray wavelengths. A detection in the radio was almost missed as a result of an incorrect position and archive problems. A direct analysis of NVSS uv data - in contrast to the catalogue or images alone - provided sufficient evidence of a detection to justify further radio investigations. The system was subsequently observed with MERLIN and the EVN in e-VLBI mode. Even though MERLIN seems to show the lensed star-forming regions and the compact cores, a preliminary analysis of the EVN data only shows an AGN in the lens itself but not the lensed cores. Additional VLA observations will be carried out soon.3 pages. Proceedings of the "9th EVN Symposium on The role of VLBI in the Golden Age for Radio Astronomy", see http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=72 . Original poster with additional images and more information available at http://www.astro.uni-bonn.de/~wucknitz/publications/pub.php?2008_evn9_1131-1231Astrophysicstext