Nebula / dark areas / artifacts
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Might the dark area below the galaxy be some sort of nebula?
Also a hint of the area in SDSS, although image is pixelated;
DECaLS DR2
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by Budgieye moderator
Dark area is probably where a cosmic ray was cut out, and a grey area substituted. Strange that SDSS has the same thing. Coincidence? what was cut out?
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by Ghost_Sheep_SWR in response to Budgieye's comment.
Indeed, intriguing questions! Might the same code for removal be used in SDSS and DECaLS, and if so what is cut out? Two different surveys rules out a cosmic ray hit.
Here is another one, maybe tidal debris mimicking a round feature? Seems rather undisturbed so unlikely with below example, which is more convincing in DECaLS and SDSS, looks like some big light-poor object;
DECaLS DR1
SDSS DR9EDIT: new processed picture
Hmm maybe tidal debris after all...
Possible other one AGZ000b0yp
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DECaLS DR1
DECaLS DR2 image
SDSS9SDSS DR9 inverted + processed
http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?ra=130.61890106583184&dec=29.40509628086925
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by Budgieye moderator
Strange.. Two different telescopes showing the same artifact in the same place.
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Yes, on multiple objects so doesn't seem like a freak accident.
Ah well i'll just keep updating former ones and posting new ones here. See what pops out eventually 😃
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Just above central galaxy AGZ000ar7s
SDSS DR9
" processed
DECaLS DR1
DECaLS DR1 Residuals
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