Image ghosts, anomalies and artifacts

• by c_cld

  Ghost either

  a fiber dust on the optics

  or wandering track (“worm”), identified with multiply-scattered low-energy electrons;

  http://legacysurvey.org/viewer/jpeg-cutout-decals-dr2/?ra=335.3238&dec=0.3211&size=512&pixscale=0.12&bands=grz

  

  see "Cosmic Rays and Other Nonsense in Astronomical CCD Imagers" from Don Groom (Lawrence Berkeley National Laboratory)

  Posted February 6, 2016 10:06 AM

• by Budgieye moderator

  Wonderful! to know what these artifacts are. So the wiggly lines are released electrons #worm. The straight lines are actually cosmic ray muons, lets call them #muon I have been incorrectly calling the straight lines as satellites,

  Thank you c_cld. I'll put the info in the index

  Posted February 7, 2016 3:47 PM