Landing page for project ES094

Recent time-domain surveys have led to the discovery of a rare but extremely interesting class transients dubbed as "turn-on" AGNs, which have changed from quasi-quiescent galaxies to broad-line AGNs within only months to years. Such rapid state transformation provides the unique laboratory to explore the ignition mechanism of accretion onto supermassive black holes and possibly the mystery of jet formation in AGNs. Only two bona fide "turn-on" AGNs have been reported so far, and no evidence is found yet for a jet or outflow launched during the state transition. With WISE mid-IR light curves and intensive spectral follow-ups, we have identified a likely new "turn-on" AGN candidate, for which both transient radio emission and spectral evolution are confirmed. Interestingly, in addition to the core component, our recent VLBA observations resolve possibly one-side jet-like structure at a resolution of ~2mas. Here we request timely EVN observation at C-band, aiming to corroborate the resolved jet emission of the source as observed with VLBA, and potentially constrain the superluminal motion of jet or its upper limit. If confirmed, it would be the first superluminal jet in a "turn-on" AGN ever resolved.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197