MDM Observatory 2.4m Telescope Observing Report for 2015 Sep 13 Observer(s): Joel C Zinn Institution(s): OSU Instrument: OSMOS Worked for 3 hours (last half of the night) Conditions were Mixed most of the night. No equipment or software problems were encountered. Seeing and Weather: Clouds from 18:00 until 02:00. Beg: Clear, Winds Calm Mid: Clear, Winds Calm End: Seeing 2.5 arcsec, Clear, Winds Calm Observing Summary: Threatening clouds till ~2am local time. Cleared up afterward. With late start and problems as reported in the Trouble Report, took one SN spectrum and one standard star spectrum. Lost 1.5hrs due to a loss of pointing, a prospero-IC communication error, and a IC error in which the grism did not deploy properly. ------------------------------ Submitted on 2015 Sep 14 [6:25:52]