Observers: G. De Rosa, S. J. Schmidt Telescope Operator: S. Allenson Support Astronomer: O. Kuhn Instrument: MODS(cal) - LUCI Summary: We obtained cals before sunset. A camera switch failure and an AGW failure delayed our slew to the first target, INAF_Turatto. During the imaging for the three filters, we had both filter wheel and (when re-initializing the filter wheel) camera errors. We then observed INAF_Cresci; a ripped shell caused us to lose 4 exposures in the middle, and we had to cut the exposure short to avoid hitting the altitude limits for the telescope (executed 114 exp out of 120). We then observed AZ_z7uds, the mask acquisition was difficult and the standard had strange offsets. We observed OSU_BALQSO_He/SDSS0853 (executed half the program due to clouds) and spent the rest of the night on LBTB_LSSMassive (~2 h 45 m). Dome closed at UT 13:01. We took dark frames after closing the dome. Weather: At sunset clear ahead, hazy at the horizon; moderate wind (~10 m/s), T ~2 C. UT. First part of the night: mostly clear, with few cirrus/puffy clouds mainly at the horizon; moderate wind. Second half of the night: patchy clouds, especially in the N. At twilight: mostly clear. Bright time. During the afternoon: MODS slit flats (1."-1.2") NOTE: blue flats 004-006 saturated slit flats (0.8"-1" blue for saturated) NOTE: blue flats 016-0018 saturated bias8k.cal LUCI AZ_MACS0647/mos_M0647_H.flat INAF_Hunt_8AB/grbhost_zJflat.script LBT_LSSMassive/cos14.flat AZ_LGB/J0143-0049_FF.txt (errors in the scripts: flexure compensation off/central wavelength) -- too low counts changed to HALO1 INAF_Hunt_8AB/grbhost_HKflat.script flat_j2240.cal AZ_LGB/J0123+0026_FF.txt Flushing detector UT 00:31 -- Dome opened UT 00:45 -- tried to switch the camera to 3.75, but had an error and had to go to zenith to re-initialize UT 00:50 -- error recovered, continuing with beginning of the night collimation INAF_Turatto UT 01:19 -- AGW technical failure -- need to reboot UT 01:28 -- tried to setup the Ks filter while recovering -- filter wheel error UT 02:00 -- problem solved -- Aqcuisition camera wheel failure need to go back to zenith Note: we have changed the camera in the scripts from N1.8 to N3.75, since the science will not be affected and we do not have enough time to obtain skyflats for both cameras. UT 02:05 Left mirror panic -- back to zenith UT 02:12 Science exposure - Ks There might be collimation problems due to atmospheric distortions -- airmass ~2.2 -- optical average seeing from guider 1.1"-1.3" PSF looks decently round UT 02:16 Science exposure - H -- filter wheel issue UT 02:23 Science exposure - H -- optical average seeing from guider 1.1"-1.2" UT 02:26 Science exposure - J -- filter wheel issue UT 02:26 Science exposure - J -- filter wheel issue UT 02:32 Science exposure - J -- optical average seeing from guider 1.1"-1.2" INAF_Cresci/ UT 02:35 science exposure -- guiding failure -- pointing issue UT 02:40 collimation issue -- astigmatism -- collimation solved UT 02:44 -- optical average seeing from guider 0.7" UT 03:40 -- optical average seeing from guider 0.7" -- PSF looks OK -- average seeing from image ~0.5" UT 04:20 -- optical average seeing from guider 0.8" -- average seeing from image ~0.6" UT 04:52 -- shell RIP - exposures 0189-192 collimation problems UT 04:56 -- collimation recovered image 193 UT 05:10 -- optical average seeing from guider 0.7" UT 05:30 -- optical average seeing from guider 0.8"-0.9" -- cirrus/puffy clouds coming in --- UT 05:50 -- optical average seeing from guider 0.9"-1.0" UT 06:00 -- optical average seeing from guider 0.9" UT 06:06 -- exposure ended -- too close to airmass limit (executed 114 out of 120 exposures) move to zenith to change camera AZ_z7uds UT 06:08 MOS acquisition -- faint guide star, high background -- no brighter star in the field try to get the observations since MOS tomorrow will not be available collimation issues due to high background complicated acquisition of the mask 3 stars are centered in the boxes, the one at the bottom of the mask is very faint and diffuse (difficult to judge). We decide to start the exposure since the field will be setting in 2 hours and tomorrow LUCI MOS will not be available. UT 06:45 science exposure -- optical average seeing from DIMM 1.0" -- cirrus at the horizon stars traces are visible in the subtraction images of the first 2 exposures UT 07:20 cirrus at the horizon -- collimation got slightly better -- optical average seeing from guider 1.0"-1.1" UT 07:40 -- optical average seeing from guider 1.0"-1.1" UT 08:05 -- optical average seeing from guider 1.0"-1.2" -- collimation issues UT 08:18 -- optical average seeing from guider 0.9"-1" UT 08:20 Standard star acquisition -- Filter wheel error UT 08:23 Camera wheel error -- go to zenith to re-initialize UT 08:26 Standard acquisition -- try again The notes in the acquisition script are not helpful to correctly position the star -- please provide a better finding charts and more notes in the readme file. In the finding chart, the standard star was not clearly indicated, nor was the slit which the standard star should be placed. The acquisition offset did not bring the star close to any of the slits. We assumed that it should be placed in the leftmost slit based on notes in the standard spectrum script. UT 08:47 Standard exposure -- optical average seeing from guider 0.9"-1." Star is not in the second slit, after the offset.. OSU_BALQSO_He/ NOTE: the PI requested 3 tellurics for these observations. Since exposures are relatively short and we are late with the schedule, we decided to cut the initial standard UT 08:53 science acquisition -- UT 09:07 science exposure -- optical average seeing from guider 1.1"-1.2" UT 09:30 -- optical average seeing from guider 0.9"-1." UT 09:35 -- seeing is increasing -- optical average seeing from guider 1.3" UT 09:40 -- patchy clouds in the way -- optical average seeing from guider 1.1"-1.2" UT 09:50 -- Telluric acquisition -- shift the star to avoid persistence UT 10:00 -- Telluric exposure -- optical average seeing from guider 0.9" UT 10:03 -- Science acquisition UT 10:04 -- pointing problem, guide star not detected UT 10:12 -- object not visible due to clouds -- acquisition not possible. NOTE: since we managed to execute only half of the program, we do not know how to account for it. Move to LBTB target in the south -- OSA unwrapping cables LBTB_LSSMassive UT 10:15 -- science acquisition -- since the seeing has been variable we have changed the slit (for both target and telluric) to 1", as requested by the PI NOTE: acquisition script has the wrong camera in it. -- Orientation is not indicated on finding chart. Offset star positioned at delta-y ~1 arcmin from bottom of the slit as requested by PI. UT 10:30 -- science exposure -- optical average seeing from guider 0.8" no trace visible from 1st differential exposure, but the targets are supposed to be very faint. UT 10:50 -- faint traces visible from differential exposures -- optical average seeing from guider 0.6" UT 11:10 -- optical average seeing from guider 0.6" UT 11:39 -- started the "repeat" set of exposures; optical seeing average 0.65" UT 12:02 -- optical average seeing from guider 0.8" UT 12:46 -- telluric acquisition the script had the wrong acquisition camera (N3.75), but we did not have any camera wheel error by switching back to the N1.8 UT 12:56 -- telluric exposure NOTE: since we managed to execute only part of the program, we do not know how to account for it. UT 13:01 -- Dome closed Darks --