ring above the galaxy

• by grahamv199

  there is something above the galaxy, i think its a star but it has like an off centered ring around it ?

  Posted May 18, 2015 6:10 AM

• by Budgieye moderator

  White round thing is a white star, but the ring is probably an artifact that comes from imaging a bright object. It is not present in the usual 3 colour gri image. This is taken in Z or near infrared.

  

  http://skyserver.sdss.org/dr8/en/tools/explore/obj.asp?id=1237655465922199649

  

  Some reading on filters

  3.9 Spectra Guide : Physics and biology of colour
  http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000ulp?page=3&comment_id=53fef74525c64253c80003ac

  reading on filters http://www.galaxyzooforum.org/index.php?topic=274815.0

  Posted May 18, 2015 8:15 AM