Date: 2021 Apr 15 UTC LBTO Observer: Olga Kuhn Lead Partner Observer: Rick Pogge (OSU) Other Partner Observers: Dragon Reed (UM), Charlotte Wood (ND, first third) Telescope Operator: Steve Allanson Special Assitants: Trim Moon phase: 3d past new moon Summary: A mix of cloudy skies and winds again tonight, worse clouds at times than the previous night, and wind again kept us away from the southwest or any direction where the wind speed at the adaptive secondary began to approach the limits. Weren't able to open the dome until just around twilight, then closed for about 1.25 hours around 5UT due to high winds and clouds covering most of the sky. LBC programs all night, seeing ranged from good to 1.5 arcsec with brief episodes of worse seeing and poor transparency. Finished the main closed-dome LUCI calibrations, so mostly caught up with the calibration plan except MODS imaging flats and remaining LBC sky flats. Calibrations: LUCI zJspec long-slit calibrations (flats and lamps) Completed Observations: OSU_Monitor N3344, N3627, I2574, N4605, N4449, N6503, N5474, N6946 UVa_EGS: EGS01 and EGS02 Details (All times UT): ---------------------------------- 01:55 Not open yet due to clouds. The winds are high as well with a gust to 22 m/s within the last 20 minutes. 02:06 Starting LUCI closed-dome calibrations with the cal units. table above. 03:19 A gap in the clouds. Opening up. There was a problem with the latch station logic which delayed opening a bit but Steve resolved it quickly. OSU_monitor/N3344 03:37 Slewing to focus field. Created a new script as the original one had few stars in the collimation region. The new script is in the OBs/OSU_montior directory and is called N3344_edit_focus.xml (from the Program File which is on robs under /home/osurc/20210415/). 03:39 dohybrid. On the blue side, though there are many stars, only 1 pupil is being used. On the red side, 6 pupils. Blue pupils have a soft edge (like we saw at the beginning of the night last night as well) and estimated seeing is 2-3". Blue is not correcting spherical, but red is (red est seeing is <1.7"). Finally converged after 6 FPIA iterations and ultimately 3 blue pupils were used. 03:51 copointing. 03:57 Starting the science OB. 04:21 The last two pairs of Blue/Red exposures were pretty significantly affected by extinction. Make that the last pair as we closed before the final pair were taken due to winds at the adsec above the limits at that position. OSU_monitor/N3627 04:25 slewing to focus field 04:27 dofpia - finished in 2 iterations 04:34 copointing 04:37 Starting the Science OB --- it is closer to the wind direction than the focus field, so we'll have to keep an eye on the wind speeds at the adSec. Also, there are clouds closing in again... 04:44 - 3rd pair - we are looking at the cloud 05:02 10 m/s at the adSec… we need to move, aborting sequence. Last images were 050053/045956 on the b/r side. 05:04 Clouds are closing in on us, and we are going to close and wait it out. 06:19 re-opening (1.25 hrs weather downtime) Uva_EGS/EGS01 06:24 Slewing to EGS focus/copoint field 06:25 dofpia - converged in 3 FPIA iterations, but the last one on LBCB commanded a large focus offset (1195 nm). 06:31 copointing - the green circled star 06:41 Checking focus again (see above). 06:44 Starting science on EGS01.ob There are clouds but at the start of the ob we appear to be pointing at a clear patch: OSU_monitor/I2574 07:22 Slewing to focus field. Using new OB (not the original or the one created within the past few months, but another - it is in ~/osurc/20210415/Edit_OSU_monitor_OBs/ on robs as I2574_edit_focus.ob.xml. Finding chart is I2574-edit_focus.png. 07:29 Starting science. (forgot to copoint, but we are not close to mirror limits and object is at low elevation, airmass 1.4). OSU_monitor/N4605 07:43 Slewing to focus field. 07:43 dofpia 07:49 copointing 07:52 N4605 science starting OSU_monitor/N4449 08:09 Slewing to focus field 08:09 dofpia 08:14 copoint 08:19 Starting science OB UVa_EGS/EGS02 08:32 Slewing to EGS field 08:33 dofpia 08:39 copointing 08:42 Starting science, EGS02.ob Seeing does appear to have degrades to ~1.3 arcsec OSU_monitor/N6503 09:19 Slewed to focus field 09:21 dofpia 09:26 copoint 09:30 Starting science 09:34 - during first pair, the DIMM is reading 1.6" and the guide star FWHM's are ~2". OSU_monitor/N5474 09:46 Slew to focus field 09:47 dofpia 09:51 copointing 09:55 starting science observation OSU_monitor/N6946 10:32 Slew to focus field 10:34 dofpia DIMM reports 1.6" and est seeing is 1.5" 10:39 copoint 10:42 Starting the science OB 11:24 Done, closing up as 18-degree twilight in 1 minute 11:25 18-deg twilight