Why so blue?
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Wondering why the object at top middle is so blue in DECaLS DR2 in comparison with regular brown in SDSS
http://legacysurvey.org/viewer?ra=237.4708&dec=5.1410&zoom=16&layer=decals-dr2
DECaLS DR2
SDSSPosted
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Well that got swamped fast
Right, DECaLS DR2 magnitudes; number of exposures g=2 r=2 z=5
g mag = 21.48, r mag = 21.60, z mag = 21.52
Blue (g band) only very slightly brighter, so object shouldn't be that blue-colored in image, at least it isn't that 'blue' really.
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by Budgieye moderator
um... um... um.... good question
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Thanks
A good question is always the best start 😃
Maybe something almost in front in SDSS at 2 o'clock, or background noise..
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