Hello all, I would just like to advertise the success that Xiaohui Fan and I had last night, doing arcs remotely with DIS. We controlled the arc lamps via the internet (http://lampswitch35m.apo.nmsu.edu/, logon as visitor1 with the usual password), and didn't bother closing the dome or mirror covers; we were still looking out on the sky. A 30 second exposure in low-res mode with He Ne Ar gave us a fine arc exposure with essentially no overhead. Of course, if your object is bright, you will have superposed on this faint sky lines and the object itself; you can avoid the latter by offsetting the telescope slightly if it is a problem. You just have to be sure to turn off the arc lamps when you're done. Cheers, Michael APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 38 in the apo35-dis archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-dis/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-dis@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO