Unrelated to the CCD itself, there is saturation in the echelle data system at about 38,000 DN. THis is one third of the CCD saturation itself. For various reasons, we did not get into that regime, at least not on red stars which is where it is obvious. More later, when we know how to fix it. We did not see it in the first months exposures because of using different setting s in the electronics than we finally settled on near the end of commissioning. DON APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 351 in the apo35-general archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-general/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-general@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO