OSURC run UT 3/4 Feburary 2017 MODS + LBC Begin with MODS in Binocular Mode Observers: Terndrup, Liss, Wiens Telops: Bechetti Staff Observer: Rothberg Summary: First half of the night was poor seeing. The MODS target was observed and completed but data quality is unknown, project (ND_LLSthick) was not marked as completed. The second half of the night was dedicated to OSU_monitor on LBC. Seeing was generally good with a consistent sirus cloud cover. OSU monitor was not completely completed but a large number of the targets were observed: N4395 N4826 N4258 N4236 M101 N6503 Total on-sky time for this run was ~54%. UT 00:22 Heavy clouds at sunset. Waiting to see if conditions improve enough to open UT 03:58 Clouds seem to be clearing, doing pointing check near specPhot standard feige34 -----------------------MODS Observations---------------------------------------- UT 04:14 First Target: spectrophotometric standard feige 34. DIMM at acquisition 1.14. High airmass. Changing to different target. UT 04:25 Going to ND_LLSthick j0843. Pointing and Aligning. DIMM is 0.85. UT 04:32 Acquiring Target. Cloud cover is intermittent as there is a band currently passing over. Conditions are fairly poor, but we are able to acquire the target. UT 04:40 Starting science on j0843. Seeing is 0.8 - 1.0 arcsecond mods1b.20170204.0004 through 0009 mods1r.20170204.0002 through 0007 mods2b.20170204.0002 through 0009 mods2r.20170204.0004 through 0007 Guide star is varying in brightness as clouds pass over. Getting intermittent guide star warnings. Object will remain in the queue due to uncertainty about quality of data. Taken in weather down time. UT 06:00 Finished with j0843, cloud cover too great to continue for now. UT 07:38 Clouds clearing slightly, switching over to LBC for OSU_monitor -------------------- LBC Observations------------------------------------------ UT 07:58 Instrument change has finished. Still slightly cloudy with smooth sirus clouds Error on red channel while connecting to LBC: 1 or more systems has failed, filter problem on power line. UT 08:10 Problem resolved by power-cycling LBC, sending first preset UT 08:30 Dohybrid converged quickly. Wind is about 10 m/s. Facing opposite direction so it shouldn't be an issue. UT 08:37 Starting observations of N4395 after an IRAF/ds9 error. Seeing is 0.7 - 0.9. Non-photometric conditions but transparent enough to observe. Artifact in what should have been last lbcr exposure. Rerunning one exposure. (lbcr.20170204.084328 is the file with the streak.) UT 08:55 Now moving to N4214. Blue taking a while to converge. UT 09:18 Blue has converged. Starting Science. Seeing 0.8 - 1.0 UT 09:29 Moving to N3627. Near wind, but we should be pointed far enough from the direction of the wind. UT 09:37 Although windspeed is currently at an acceptable level, it is probably that it would reach too high of a level during the observation leaving us unable to complete it. UT 09:40 Moving to N4826 UT 09:46 Collimated quickly. Starting Science for N4826. Seeing 0.9-1.0 UT 10:27 Moving to N4258. UT 10:45 Red channel failed to converge during dofpia eventhough the pupils looked good. Starting Science for N4258 Seeing is 0.8 - 1.0. UT 11:13 Blue images have elongated PSF in exposures taken with U filter. UT 11:25 Moving to next target and focusing, N4236 UT 11:35 Starting science for N4236, seeing is 0.8-1.0 arcsecond. UT 11:50 Moving to M101 and focusing. UT 12:05 Starting Science for M101. Seeing is 0.8 arcseconds. UT 12:38 Moving to N6503. Close to astronomical twilight with consistent non-turbulent cloud cover. Will try anyways. UT 12:44 Starting Science on N6503. Sky brightness is 21.96 on start. Seeing is 0.9-1.2 arcseconds. UT 13:01 Rerunning N6503. Seeing is degrading. 1.1 - 1.3 arcseconds. Fairly thick clouds have blown over. -------------------------------------------------------------------------------