Ok listen, The "spots" seen last night are *not* bad pixels, they are not always present (I've seen them on 2-3 occasions myself), they occur as a group of perhaps 4 or 5 blobs along the x axis (i.e. aligned with the normal bias patterns) near the top of the chip (IRAF), they are much wider than typical stars in bad seeing, they are not exactly the same shape or brightness, but are similar in form and are spaced semi-regularly along the x axis, they are *not* burn in, as A). Grim hasn't seen another star of ANY brightness in well over a week, B) I have nailed the GRIM with 0th mag stars before and NEVER seen any residual even in the very next image let alone in a series of 20 or more. I have no idea what they are. Please do not take second-hand quotes from other sources and pretend they are the gospel truth. Speculation will get us nowhere. Eddie -- --------------------------------------------------------------------- Louis E. Bergeron (Eddie) /\ * * *|| * Apache Point Observatory * / \ * ^ ==()== P.O. Box 59 * / \ * * / \ *|| * Sunspot, NM 88349-0059 * / \ / \ * * (505) 437-6822 * / \ * / \ * ,_ o * || * || * * bergeron@galileo.apo.nmsu.edu / //\, Ski New Mexico !! ___________________________________\>>_|_____________________________ \\, APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 24 in the apo35-grim archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-grim/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-grim@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO