OSURC run, night 4: UT October 26, 2019

Observers:
   Charlotte Wood, University of Notre Dame du Lac
   Donald Terndrup, The Ohio State University

LBTO Astronomer:
   Olga Kuhn

Telescope operator:
   Josh Williams

Summary:
   Afternoon calibrations on MODS
   Start observing with MODS, then switch to LBC

Completed MODS programs:
   ND_carbon/jy1900
   UVa_BCD/J0153

Completed LBC programs:
   ND_sn09ig
   OSU_SBF/ACG112521
   OSU_SBF/UGC01703
   OSU_Monitor/NGC 2403
   OSU_Monitor/M82
   OSU_Monitor/M81
   OSU_Monitor/NGC 3077
   OSU_Monitor/NGC 2903
------------------------------------------------------------------------------
MODS:
    
Afternoon: calibration images
   slit flats: 5.0" dual
   slit flats: 5.0" red + blue
   bias in 8K and 3K format (mods1r and mods2b)
   twilight imaging flats: 1K test images, 3K science images

Calibration images after switch to LBC:
   bias frames, 8K  (both sides)
   bias frames, 3K
   lamp flats, 3K

Clear to start, with low winds.  Seeing about 1.2 - 1.3" to begin,
improving to sub-arcsecond by the middle and end of the night.

All MODS observations in dual mode.

UT_start  Object/Notes
  01:35   BD+28 4211
  01:55   Feige 110

  02:10   ND_carbon/jy1900
          Originally selected guide star was outside the patrol field.
          We flipped the position angle by 180 degrees and selected a
          suitable new guide star.
  02:25   Begin.  Seeing about 1.0".  An emission-line object is also
          on the slit.  

  04:15   UVa_BCD/J0153
          Originally selected guide star was too faint, and may
          actually be a galaxy.  We selected a different guide star.
  04:43   Begin.  Seeing about 0.7".
          Last image mods1r is bad (a known intermittent problem).

  05:50   Switch to LBC.

------------------------------------------------------------------------------

LBC:

UT_start  Object/Notes
  06:25   Start ND_sn09ig
          Seeing in red 1.0", a bit better in the blue.

  07:25   OSU_SBF/ACG112521
          Blue collimation is good, red is not.
          Stop after two images to see if we can improve things.
  07:45   Start. Much better!  0.5 - 0.6" seeing blue, 0.85" red.
  08:45   end

  08:45   OSU_SBF/UGC01703: focus and collimation  
  08:55   Start. 
  09:48   End.  Blue FWHM smaller than red.  Red has rather
          significant PSF variation across the field.

  10:00   OSU_Monitor/NGC 2403   Seeing 0.8"

  10:32   OSU_Monitor/M82   Bit of a delay because we had to
          restart RB_science.  Seeing 0.85" (blue), 0.92" (red)

  10:53   OSU_Monitor/M81   Seeing 0.85"

  11:18   OSU_Monitor/NGC 3077   Seeing 0.85" blue, 0.95" red

  11:45   OSU_Monitor/NGC 2903 

end ---------------------------------------------------------------------------