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We report the discovery of a gravitationally lensed hyperluminous infraredgalaxy (L_IR~10^13 L_sun) with strong radio emission (L_1.4GHz~10^25 W/Hz) atz=2.553. The source was identified in the citizen science project SpaceWarpsthrough the visual inspection of tens of thousands of iJKs colour compositeimages of Luminous Red Galaxies (LRGs), groups and clusters of galaxies andquasars. Appearing as a partial Einstein ring (r_e~3") around an LRG at z=0.2,the galaxy is extremely bright in the sub-millimetre for a cosmological source,with the thermal dust emission approaching 1 Jy at peak. The redshift of thelensed galaxy is determined through the detection of the CO(3-2) molecularemission line with the Large Millimetre Telescope's Redshift Search Receiverand through [OIII] and H-alpha line detections in the near-infrared fromSubaru/IRCS. We have resolved the radio emission with high resolution (300-400mas) eMERLIN L-band and JVLA C-band imaging. These observations are used incombination with the near-infrared imaging to construct a lens model, whichindicates a lensing magnification of ~10x. The source reconstruction appears tosupport a radio morphology comprised of a compact (<250 pc) core and moreextended component, perhaps indicative of an active nucleus and jet or lobe.

The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z=2.553 discovered through citizen science