OSURC run, night 2: UT October 24, 2019 Observers: Charlotte Wood, University of Notre Dame du Lac Donald Terndrup, The Ohio State University LBTO Astronomer: Olga Kuhn Telescope operator: Josh Williams This will be a short night, as we need to hand off about UT 05:30 to a time-critical PEPSI program. Afternoon: starting with LBC. Calibration: bias frames B and R sky flats - mainly for practice. There are recent sky flats in the archive that should be adequate. Forecast for the next couple of nights includes high winds, and morning flats will not be possible tonight because of the PEPSI program. Completed programs: OSU_Monitor: NGC 6946 NGC 6503 NGC 672 - collimation problems but completed it. NGC 925 Night begins with clear skies, low humidity, and light winds. Predicted seeing is poor, but after collimation we have blue seeing 1.0" and red seeing 0.6" at first pointing. ------------------------------------------------------------------------------ UT_start Object/Notes 01:20 Use OSU_Monitor/NGC 6946 as setup target. It is up at high elevation angle. 01:30 Start OSU_Monitor/NGC 6946. DIMM 1.0" 02:15 Sequence completed. 02:25 Going to OSU_Monitor/NGC 6503. DIMM 0.7" 02:36 Start observing sequence. 02:50 Finished 03:04 Started OSU_Monitor/NGC 672 DIMM 0.75-0.80" Blue side collimation poor. Stop sequence to recollimate. Red side 0.8" FWHM. 03:25 Even after a second try at the collimation, the PSFs on the blue side are not very good. Will let the sequence finish, and maybe do this again if we have another night with LBC. As the sequence progressed, the quality of the blue images got steadily worse. 03:55 Clear active optics on blue side, then run dohybrid. Will stay here to see if we can complete an observation of this target. 04:15 Try again. Seeing 1.1" in blue. Seems to be good. 04:50 Set up on NGC 925. 05:02 Start observing sequence. Good focus. Seeing a bit worse than before. ------------ end -------------------------------------------------------------