Image artifacts

by Ghost_Sheep_SWR

Seems there is something going wrong in nearly all GAMA KIDS bands, which I suspect has something to do with the nearby high proper motion foreground star HD 126053, which also seems to be a binary star system with a brown dwarf? Too much references..., Sigh there I went again, down the rabbithole..... Soooo anyway looks like a regular ringed galaxy to me.

enter image description here GAMA KIDS gri

enter image description here SDSS gri cutout

Posted December 19, 2017 10:50 PM

by Budgieye moderator

Amazing sight, ghost.

That red star really moves in between the images in SDSS and DECaLS dr5 . It moves to the left and down (south east)

My estimate, using the width of my thumb pressed on the screen, about 15 arc-sec in 15? years. so about 1 arc/sec per year, or approximately 1,000 marcsec/year.

http://legacysurvey.org/viewer?ra=215.8146&dec=1.2395&zoom=15&layer=decals-dr2

Actual motion is 223.8, -477.4 , so without doing geometry, about 600, using Gaia data

http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=&-out.add=_r&-out.add=_RAJ%2C_DEJ&-sort=_r&-to=&-out.max=20&-meta.ucd=2&-meta.foot=1&-c.rs=50&-c=215.8150+1.2398

http://skyserver.sdss.org/dr9/en/tools/explore/obj.asp?id=1237648722857033752

enter image description here

Posted December 20, 2017 7:06 AM

by Ghost_Sheep_SWR in response to Budgieye's comment.

Ooh nice, ps Aladin Desktop has an easy to use measuring tool for exact distances.

Which reminds me of a mover I saw recently while making the NGC 5750 image from AGZ000eawy, funnily it had a lot of quasar references in VizieR and only the most recent ones designated it as a star with PM.

Any particular reason why a star would have so much QSO references at first?

Posted December 20, 2017 8:42 AM