Interesting object

https://www.legacysurvey.org//viewer/?ra=165.3431&dec=-13.8767&layer=ls-dr10&zoom=16&sdss-cat

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That’s an issue of one of the i-band images: - a practicually overexposed one.

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Sorry how is this overexposed? It seems the same in all bands (with slight variation). Could this not be a binary star system? Or overlapping foreground and background pair?

I think what happened is that the time for the i-band to reach was longer than the other exposures, h, the exposure was less subtracted, or something else. as i stated that one of the i-band exposures had an issue.

This is what im referring to.
https://www.legacysurvey.org/viewer/ccd/ls-dr10/decam-975280-S25.xhtml?rect=552,1713,100,100

yes but in all exposures of all bands there is this double object. Their comparative luminosity also changes over bands which could indicate a binary system afaik. Can anyone weigh in on this? @tombickle

There are some other individual i - band exposures roughly near the same time (2021-03-10) in some of the i - band exposure.

Gaia kinematics show they are both at approx the same distance and very similar proper motions. Almost certainly a binary system.

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Okay, thanks for pointing this out. I would like to ask Dustin if one of the i-band images has a problem…

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I would have guessed that one of the i-band images has a much larger seeing that the rest.
In the single exposures, “decam i 975280” looks wider than the rest… it’s reported to have a seeing of 1.6", which is not great but not that bad, but I guess enough to produce this effect…

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Ah cool. Is there any specific catalogue that usually houses binary systems?

SUPERWIDE (I think its called) in vizier usually has the obvious gaia ones.

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