Subject: AWI0004y8q

Comments

by MasterFalk

What is the black disk in blue spectrum near the center?
Absorbtion only in 0,665µm?

Posted May 24, 2016 8:29 PM
by voyager1682002 moderator

It looks like just a speck of dust

There are more examples here:
https://talk.diskdetective.org/#/boards/BWI0000009/discussions/DWI00000ot

Take a look at "The Disk Detective FAQ" no. 5 " What do artifacts look like, and where can I find examples?"
https://blog.diskdetective.org/2015/03/05/the-disk-detective-faq/

Posted May 25, 2016 4:55 AM
by mboschmd moderator

These are old, original silver emulsion photos with scratches, spots, artifacts of all kinds. Confined to DSS2. SDSS used digital detectors

Posted August 28, 2016 10:02 AM
by MichalBiesiada

#noSIMBAD

Posted September 9, 2016 2:00 PM