ARG0002ttx - Sky view for ARG0002ttx

• 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

  1. Presence of the very bright IR source nearby so image is overexposed

  2. Processing glitch

  Edit: Bright star is HD 74229 - 45 Cnc (45 Cancri)

  http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HD 74229

  Posted December 28, 2013 9:24 AM

• by DocR scientist

  Thanks for the detective work. We'll have to get this sorted out.

  Posted December 28, 2013 2:51 PM

• 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! 😃

  Posted December 29, 2013 4:10 AM

• by Dolorous_Edd

  I have just done a quick search for this case
  http://radiotalk.galaxyzoo.org/#/subjects/ARG0002xrs

  Image centered at RA: 146.93 Dec: 11.55 ( 09h 47m 43.20s +11d 33m 00.0s) blue circle

  Source

  

  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

  Source

  
  

  It is M96 ! Ain't she a beauty?

  http://radiotalk.galaxyzoo.org/#/subjects/ARG0002pqm

  Decided to be a a combo breaker 😦

  Click me

  Posted December 29, 2013 9:31 AM

• by Dolorous_Edd

  Lets continue? Shall we?
  http://radiotalk.galaxyzoo.org/#/subjects/ARG0002yw8

  Oh dear ..

  Click!

  It is HD 113496
  http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=III/135A/catalog&recno=113496

  Posted December 30, 2013 3:41 PM

• 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!

  Posted January 6, 2014 10:56 AM

• by ivywong scientist, admin

  Yes, this is what @rad_astronomer is saying.

  Posted June 16, 2016 9:48 AM

• 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.

  Posted June 17, 2016 9:26 PM