ARG0002ttx - Sky view for ARG0002ttx
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by Dolorous_Edd
Just out of curiosity
Here is image from WISE 3.4 Micron All-Sky Survey centered at RA: 130.86 Dec: 12.75
0.05 degree field ( on the left ) and 0.15 degree field ( in the middle ) and DSS 2 ( Red - 0.15 degree field ) on the right
coordinates of the bright star 08 43 12.44 +12 40 54.3
There are few possible reasons for white IR background
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Presence of the very bright IR source nearby so image is overexposed
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Processing glitch
Edit: Bright star is HD 74229 - 45 Cnc (45 Cancri)
http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HD 74229
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by DocR scientist
Thanks for the detective work. We'll have to get this sorted out.
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by ivywong scientist, admin
@DolorousEdd: Thanks heaps for the excellent investigative work. We should hopefully figure this out soon. The first reason you listed is easier to understand than the latter. It's is actually the latter that we're investigating at this stage.. Thanks again and stay tuned! 😃
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by Dolorous_Edd
I have just done a quick search for this case
http://radiotalk.galaxyzoo.org/#/subjects/ARG0002xrsImage centered at RA: 146.93 Dec: 11.55 ( 09h 47m 43.20s +11d 33m 00.0s) blue circle
Bright star is HD 84748 (R Leonis)
http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=III/135A/catalog&recno=84748
Also checked this http://radiotalk.galaxyzoo.org/#/subjects/ARG0002ww3
It is M96 ! Ain't she a beauty?
http://radiotalk.galaxyzoo.org/#/subjects/ARG0002pqm
Decided to be a a combo breaker 😦
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by Dolorous_Edd
Lets continue? Shall we?
http://radiotalk.galaxyzoo.org/#/subjects/ARG0002yw8Oh dear ..
It is HD 113496
http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=III/135A/catalog&recno=113496Posted
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by rad_astronomer scientist
Hello, I think most of these cases are first option, a very bright near by source. Only 0.13% of sources may be missing WISE data due to processing issues. When the WISE data gets converted into the underlying png or jpeg file then the `stretch' of the greyscale has to be specified. I presume that the same stretch is used for every single image rather than tailoring it to the amount of flux seen in each 0.05deg image. Hence, images with a lot of flux from a bright nearby or extended source will appear white or almost white. HTH!
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by ivywong scientist, admin
Yes, this is what @rad_astronomer is saying.
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by vrooje admin, scientist in response to ivywong's comment.
Moderation Note for those following along: @ivywong's comment above was in response to a now-deleted comment that turned out to be from a spammer.
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