MDM Observatory 2.4m Telescope Observer's Report for 2001 Dec 22 Observer(s): Helfand/Johnson Institution(s): Columbi Instrument: MDM8K Worked for 12 hours (all night) Conditions were Mixed most of the night. Problems were encountered, see the separate trouble report for details. Seeing and Weather: Beg: Seeing 1 arcsec, Clear, Winds Calm Mid: Seeing 1.2 arcsec, Clear, Winds Calm End: Seeing 1.3 arcsec, Clear, Winds Calm Observing Summary: Had short period of .9 seeing at beginning of night, deteriorated as the night progressed. Thin clouds briefly covered sky during middle of night, but were gone in less than an hour. Exceedingly dry, very nice after last night's disappoinment Got M31 and deep images of X-ray counterparts Dome sporadically lazy, didn't track during exposures causing slight occultation during long exposures. ------------------------------ Submitted on 2001 Dec 23 [6:35:25]