/home/OSURC/Logs/Observers: G. De Rosa, S. J. Schmidt, D. Berg Telescope Operator: G. Bechetti Support Astronomer: Olga Kuhn Instrument: LUCI-MODS Summary: Dome closed due to clouds and humidity. We used the night to obtain MODS and LUCI calibrations. At UT 11:00, it was still overcast with 100.6% humidity so we called the night. Weather: Snowed during the morning. Overcast during the afternoon. At sunset: still overcast, humidity ~ 90%. UT 4:50, still overcast, humidity ~95%. UT 08:00, overcast, humidity >100%. UT 10:15, overcast, humidity ~100%. UT 23:40, MODS calibrations Bias 8kx3k Bias 3kx3k Bias 8kx3k, 2x2 binning macs0717.prmosflats.cal, flats look fine but the image shows strange reflection (Olga is investigating) -- note: "reflections" are known prism ghosts... QTH1+UG5 saturated in the red but fine in the blue. Exposure time is at minimum, it cannot be improved. VFLAT max counts ~10000., run another set of VFLAT with exposure time=1.5 s macs0717.prmosflats_1.cal VFLAT, 5 exp, exposure time 1.5 s, max counts macs0717.prmoslamps.cal, arc lamp lines look fine but the image shows strange reflection. Dual grating pixel flats Red grating pixel flats Blue grating pixel flats Blue grating pixel flats, binning 2x2: saturated; after running various tests, we have found the optimal configuration (files starting from mods1b.20121118.0067.fits) macs0647.prmoslamps.cal, arc lamp lines look fine but the image shows similar reflection as macs0717 macs0647.prmosflats.cal, the image shows similar reflection as macs0717 script modified by adding a set of VFLAT with exposure time=1.5 s macs0744.prmoslamps.cal some images show reflection as well (esp blue 93) macs0744.prmosflats.cal same UT 5:30, moving on to slit flats slitflats_b.cal - noticed it didn't include 2x2 binning slitflats_r.cal slitflats.cal slitflats_b_2.cal UT 08:00 switch to LUCI calibrations OSU_UCDz arc_HK.cal - half of the slit covered by on-axis guide probe - first and second set of exposures bad, then ran ok flat_HK.cal arc_zJ.cal flat_zJ.cal - had to scale up exposure times - good ones start with 82 (or so) OSU_BALQSO_He: the scripts provided are not adequate and have serious issues Flat_HK.obs - not sure what observer meant to do here - flexure comp off, not a spec flat Edited a flatlamp.cal to produce flats flatlamp.cal (edited version) arclamp.cal (edited version) aborted an incorrect script before arclampsJ.cal (new version) arclampsH.cal (new version) flatlampJ.cal (new version) flatlampH.cal (new version) OSU_Lensmass HKarcs.cal: script failure. The mask ID does not correspond to any of the LUCI masks installed. AZ_Lensspec: flatfields lamps AZ_z7uds Ran flat script; emailed PI to check if arcs are desired