MDM Observatory 2.4m Telescope Observing Report for 2015 Feb 12 Observer(s): Miller Institution(s): Michigan Instrument: OSMOS Worked for 10 hours (all night) Conditions were Non-Photometric most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: Beg: Seeing 2 arcsec, Patchy Clouds, Winds Moderate Mid: Seeing 1.5 arcsec, Cirrus, Winds Moderate End: Seeing 1.5 arcsec, Cirrus, Winds Moderate Observing Summary: Guider drove me nuts. impact was at least 45 minutes. This is the second night where the guider has acted fussy. I had a low decl target (-25) and while I was watching it move in the dome (to make sure all was ok), I noticed that the LN2 started pouring out of the dewar.After the exposure, I refilled. ------------------------------ Submitted on 2015 Feb 13 [5:14:16]