> When we upgrade DIS with new CCDs, how would you prefer we align the > detectors with respect to the dispersion direction? If we align > them so that their columns are parallel to the dispersion direction, > a bad column would wipe out a strip in the spatial direction. If we > align them so that their rows are parallel to the dispersion, a bad > column would block one pixel worth of wavelength. Please reply to > me with your preferences, so that we can try to satisfy as many > users as possible! I'd vote for aligning bad columns such that they would wipe out a column in the spatial direction. One can always move objects so as to avoid a bad column or two. While we are on the subject, let me ask a few questions that I have been meaning to ask. Are any changes going to be made to the optics? Specifically, 1) is the blue wavelength cutoff going to be fixed, 2) would it be possible to change the spatial resolution to 0.4" to match SDSS, and 3) can we increase the number of pixels per resolution element? Thanks, Gordon Richards APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 437 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