https://www.legacysurvey.org//viewer/?ra=134.7789&dec=-0.1730&layer=decals-dr5&zoom=10&const
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telescope lenses are not gravitational lenses bud
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If you turn on the “DECam Footprint”, you’ll see those red lines all line up with edges of chips in the camera. It’s gone in later DRs
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Oh yes I am sorry, I thought gravitational lenses are something to do with the telescope. Gravitational lenses are galaxies warped by another one’s gravity. Right?
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Yes, either individual galaxies, or galaxy clusters, can be gravitational lenses. (Any mass can, but those are the most common visible lenses)
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Thank you 