Date: 2021 Feb 11 UTC
LBTO Observer: Olga Kuhn
Lead Partner Observer: Hayley Williams (Minnesota)
Other Partner Observers: Rick Pogge (OSU)
Telescope Operator: Steve Allanson

Moon phase: 1d Waxing Cresent

Summary:

It snowed before sunset, but through Steve's efforts to prevent
accumulation we were able to open around midnight.  We observed two
LUCI programs then reconfigured to the LBCs until dawn.  About 5.25
hours were lost to weather.  The seeing improved over the time we were
open, starting at ~1.5" and going down to <1" during the
UM_Flashlights observation. See the AGw Data plot on the OSURC webpage
for the record (during LUCI)


LUCI programs:
  OSU_XMDs: UGC4483
  UM_Flashlights: longslit2

LBC programs:
  OSU_monitor: M81, N4236

Calibrations:
  LBC biases, no MODS or LUCI closed-dome calibrations needed



Details (All times UT):
----------------------------------

23:30UT Light snow started

00:15UT Accumulation noticeable on the roofcam, snow becoming heavy

00:40UT Running snow melt, in case conditions allow us to open later

02:30UT Snow ongoing

05:50UT Roof is clear. Waiting for clouds/humidity

07:13 Steve is opening the chamber. The humidity had been hovering
      around the limit for a while although the skies had cleared, but
      now it is trending down.

07:23 Checking pointing and collimating near the first target. The seeing is <2". 


OSU_XMDs_LUCI - UGC4483

07:29 Slewing to the telluric, HIP39822

07:45 Slewing to the science target, UGC4483.

08:09 starting science. We had a LUCI1 camera wheel error moving from
      N375 to N18. The negative limit was hit. Re-initialized and
      checked flex comp mirror offsets were OK using sky lines.

UM_Flashlights/longslit2

09:24 slewing to longslit2 science target. The guide stars were not
      found and Steve is trying to nudge them into the acquisition
      field, then resent the preset.


10:00 starting the science integrations. 
      There was a pause in the sequencer after the blind offset was made. I'm not sure why. 

10:03 Now we are starting the science integrations. The seeing is about 1" on average.

10:36 The seeing is now down to 0.72"/0.86" on the SX/DX side.

11:33 slewing to longslit_telluric2 

      The mask went to turnout for the confirmatory through-slit
      images and then it went on to take the spectra with no
      pause. Let it go as the spectra are there, will check later.
      Should have paused, found it was an undetected script error.
      Made a new version of the OT file, UM_Flashlights_revised_v2.xml
      and put it in ~/OBs/UM_Flashlights for future reference.
  
================================

11:52 Reconfiguring to the LBCs

12:05 - Steve is going up to check a drive fault on the swing arms. 

12:19 - Steve resolved the problem (it happened between the prime
        focus & tertiary but we're not sure right now what exactly the
        problem was). IT 8319.

OSU_monitor M81

12:25 Slewing to M81

12:27 dohybrid, 1 wfs + 2 fpia iterations

12:33 copointing

12:36 Starting the science integrations

12:48 finished

12:41 18-deg twilight

OSU_monitor N4236

12:48 Slewing

12:50 focus with dofpia

12:54 Starting the observation. 

13:06 finished

13:22 Steve closed the chamber. Clouds came in at twilight so no sky flats.

Closed Dome Calibrations:

   No closed dome calibrations were remaining for MODS and LUCI.

   LBC Biases - 25 LBC biases. The LBCR biases show horizontal
   striping, which is a problem we sometimes see (may be more common
   at zenith), but the LBCB ones look fine.