https://www.legacysurvey.org//viewer/?ra=174.5524&dec=22.3614&layer=ls-dr9&zoom=16
I could be entirely wrong about lensing though with that greenish colour and the less redshift producer
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not lensing ~ shell galaxy more likely
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The larger galaxy is not a shell galaxy, That “arc” looks like typical gravitational lensing, only the counterpart is hidden, although the lens is more green
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we’ll agree to disagree
Not sure why the colour is weird