Observers: Jill Gerke, Scott Adams (OSU) Support Astronomer: Dave Thompson Telescope Operator: Geno Beccheti SUMMARY: Clouds around horizon, clear over head. Started the night with LBC then switched to MODS at 10PM. Had some issues with the telescope encoders. Lost an hour to clouds. Sub-arcsecond seeing much of the night. targets observed: OSU_monitor_N6503, UVa_Wise1958, OSU_monitor_N6946, UVa_Wise2345, OSU_MClusters_N7A, UM_par96, and OSU_MClusters_PleA INSTRUMENTS: LBC, MODS times are in UT 01:45- starting skyflats U_spec and r' 02:02- done with skyflats, moving to first target to start focusing 02:15- copointing for OSU_monitor_N6503 02:26- starting OSU_monitor_N650 OB, seeing ~1.0 02:42- focus and copointing for UVa_Wise1958. Some problems with the copointing. first just iraf errors then pointing was very off, ~3arcmins. 03:09- checking telescope pointing. something is off. scope resetting encoders 03:15- starting focus and copointing for UVa_Wise1958 again. Copointing shifts much better. 03:24- starting UVa_Wise1958 OB, seeing ~1.0 03:40- focus and copointing for OSU_monitor_N6946 03:50- starting OSU_monitor_N6946 OB, seeing ~0.8 04:29- focus and copointing for UVa_Wise2345 04:39- starting UVa_Wise2345 OB, seeing ~0.9 04:55 switching to MODS for the rest of the night 05:31- reconfiguration complete (an encoder issue slowed the switch to MODS) acquiring OSU_MCluster/N7A IMCSLock timed out multiple times. Apparently the laser power was low. 06:05- starting OSU_MClusters/N7A.obs seeing ~0.7" 06:28- acquiring UM_par96 seeing ~0.8" 06:41- starting UM_par96.obs seeing ~0.8" 07:47- acquiring OSU_ASASSN/ASASSN14gm clouds developing to the south 08:14- starting OSU_ASASSN/ASASSN14gm.obs seeing ~1.1" 08:36- acquiring OSU_MClusters/PleA 09:18- observing OSU_MClusters/PleA we might be looking through some cirrus -> first exposure looks good, the 2nd exposure has no signal, and the 3rd exposure has very weak signal -- calling the observation incomplete significant cloud coverage too thick to get DIMM reading switching to poor-weather programs 09:39- acquiring OSU_AGN/pg0052 clouds too thick to lock on guide star waiting to see if the clouds will thin out 09:48- re-attempting acquisition - no, clouds still too thick 10:40- still cloudy, trying for the Pleides in a sucker hole acquiring PleA 10:47- clouds dissolved -- almost completely clear now 11:00- observing PleA this time we only have one star aligned on the slit 11:05- lost guiding, aborting observation trying to re-acquire but the guider isn't finding the guide star 11:11- pointing check -- pointing is off encoder issue again reset encoder, checked pointing 11:29- re-acquiring PleA observing only have one star aligned on the slit seeing 0.8" finished 15 minutes into astronomical twilight 12:02- acquiring g191b2b (standard) 12:10- observing g191b2b 12:33- closing up i12:47- starting end-of-night calibrations biases and slit-flats