Interesting object - what is that

https://www.legacysurvey.org//viewer/?ra=347.4439&dec=16.6836&layer=ls-dr9&zoom=16

what is that red thing? artifact? dosent show up on the DR9 models filter but the DR8 models filter shows this as a smudge

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It looks like an artifact (maybe a cosmic ray) in one of the z-band images. Looks like it’s the last one in this list,
https://www.legacysurvey.org/viewer/exposures/?ra=347.4434&dec=16.6827&layer=ls-dr9

cheers,
dustin

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artifact foreground star position