Smeaton et al. present the discovery of two extended, low surface brightness radio continuum sources, both consisting of a near-circular body and an extended tail of emisson, nicknamed Stingray 1 (ASKAP J0129–5350) and Stingray 2 (ASKAP J0245–5642). Both are found in the direction of the Magellanic Stream, a stream of high-velocity clouds of gas extending behind the Large and Small Magellanic Clouds. The connection of the stream to the Magellanic Clouds was established via observations in the early 1970s with the Parkes 18m Kennedy antenna (which was given the Wiradjuri name Giyalung Guluman, meaning ‘Smart Dish’, in 2020). The Stingrays were discovered in the ASKAP EMU survey at 944 MHz and the team explore a variety of scenarios for the origin of these objects. The presence of neutral hydrogen absorption features related to the Milky Way and the Magellanic Stream lead the team to conclude that Stingray 1 has a possible but unlikely association with the Magellanic Stream, and Stingray 2 has no physical association with the Magellanic Stream. The most likely scenario from the available data is that the objects are background head-tail radio galaxies.
