Fig. 1.
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Left: Hubble Space Telescope F814W (white) and ALMA Band 4 (red) imaging of RXJ1131−1231. Centre: ALMA imaging from 2015 July 19. Right: ALMA imaging from 2020 March 16 and 17. Contours start at ±2σ and increase by a factor of 2. The triplet images (A/B/C) and the AGN in the lensing galaxy (G) are clearly detected in ALMA data. We extract the mm-wave fluxes directly from the observed visibilities rather than the CLEANed images.
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