Thick blue ring, it's just too perfect
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by Budgieye moderator
http://talk.spacewarps.org/#/subjects/ASW0001rcc/science/discussions/new
big discussion going on in Recent
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by c_cld
Using GZ for image attachment, please find another fits files processing/filter stretch
I assure of no removing red eye by photoshop... 😃
You can verify by imaging yourself !
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by Capella05 moderator
Since being an Einstein ring is now eliminated from the equation - any thoughts? A Star?
So what do you think it is?
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by Budgieye moderator
Variable star? Ecliping binary star? Star with nebula?
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by anupreeta scientist, admin
I also think this is just an artifact of the color composite making tool. I looked at the g-r-i FITS images using ds9 with log scaling in each filter and the color gradients are not as contrasting as in the image on the left.
I am not completely confident about the nature of this bluish white object but the high flux of the object and the colors indicate that this is most likely a star in close projection to a group of yellow galaxies.
I believe we may come across a few more stars/objects with similar profiles who would appear to have similar bluish rings with a yellowish/red center, as a result of this artifact.
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by c_cld
Thanks @Anupreeta for your DS9 check.
I succeeded to spot this object with Id
SDSS J020326.33-055531.5 1237679341103874245which seems to have the photometry of a quasar
u g r i z
18.90 18.67 18.38 18.06 17.74A quasar was my guess seeing the filters images, and then the terapix cuts-out
ugr
gririz
Notice the terapix gri got the same processing artifact as SpaceWarps 😃
I wonder if this 'quasar' is magnified in the light of sight of the small group (not very massive?)
CADC 60 arcsec square
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by Tom_Collett scientist
Thanks for putting up different visualizations - it's pretty clear now that this isn't an Einstein ring.
It's probably a star, but there's nothing to stop it being a quasar (it's really hard to tell the difference with photometry alone).
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by c_cld in response to Tom Collett's comment.
The SDSS photometry satisfies the search criteria of Low-z QSO candidates using the color cuts from Gordon Richards.
I agree it's not a proof but a strong point to reject most of star classes.
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by c_cld
http://talk.spacewarps.org/#/subjects/ASW0001rcc definitely a #QSO
😃
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