Objects entirely absent in the optical

• by trkendall

  Hi I used to be a professional astronomer and I've seen lots of images like these. I'm confused about a couple cases I've seen where there is nothing at all within the circle in the optical.
  They weren't in SIMBAD which means nothing but they had blue SEDs. What should I do about these? I need to know before I can proceed with confidence! Thanks timk

  Posted February 7, 2015 1:58 PM

• by anoxie

  http://talk.diskdetective.org/#/boards/BWI0000006/discussions/DWI0000e3h

  Posted February 7, 2015 4:41 PM

• by voyager1682002 moderator

  Hi trkendall, welcome to Disk Detective! Are you referring to no DSS2 images, if yes, take a look at this : http://talk.diskdetective.org/#/boards/BWI0000002/discussions/DWI0000wj1
  You still can determine whether a target object is a good candidate by looking at other wavelengths.

  Posted February 8, 2015 3:17 AM

• by anoxie

  trkendall, what do you mean by "... they had blue SEDs" ?

  Posted February 8, 2015 12:05 PM