LBT/OSURC Observing Notes
Date: 2016 April 05 UT
Observers: Jonathan Brown and Donald Terndrup (at Tucson Remote Facility)
Support: Barry Rothberg
TelOps: Steve Allanson

Observing mode:
  MODS longslit
  
Conditions:
  Partly cloudy at sunset, then various cloud cover.  While occasionally it was
  relatively clear for a while, the guide star counts were often highly variable.
  We stopped for calibrations when it was too thick to observe.

Completed science targets:
  OSU_BLRqsos/J1119
  OSU_BLRqsos/J1254
  OSU_BLRqsos/J1453
  OSU_BLRqsos/J1558
  ND_boks45906  (low S/N through clouds, so may try again)
 
Calibration stars:
  Feige 34
 
Filenames:
  mods1b.20160405.nnnn.fits
  mods1r.20160405.nnnn.fits

Some MODS calibration frames tonight, more on following nights.
  
.:.:.:.:.:.:.:.:.:.:.:.:.:.:.

Begin a couple of hours before end of evening twilight with calibration frames
for MODS.

                      Image numbers
Frame type         mods1b       mods1r
Sieve Mask            1            1
Dual Vflat          2 - 11       2 - 6
Ne + Hg lamps         12           7
Xe+Kr lamps           13           8
Ar lamp               14           9


UT 0231
  Feige 34, dual mode.
  At the moment the skies are relatively clear, but the satellite map shows bands
  of clouds heading in.
  Seeing 0.95"
  End UT 0243
  Blue images 15 - 17
  Red images  12 - 14

UT 0245
  OSU_BLRqsos/J1119, telluric star first and quasar after.
  Seeing 1.1 - 1.2"
  Clouds increase during science exposures; on 3rd image the guide star faded out
  right at the end of the exposure.
  UT 0254 - science observations for J1119Tel
  UT 03nn - science observations for J1119

                      Image numbers
                  mods1b        mods1r
  J1119Tel        18-20         18-20
  J1119           21-23         24-26

UT 0400
  Clouds have thickened.  Point the telescope at the zenith and do some
  MODS calibrations.

  NGC5747 calibrations F1  (blue images 24-28, red 27-31)
  NGC5747 calibrations F2  (blue 29-33, red 32-36)

  SDSS r imaging flat for ASASSN-14li    (red 37-38)
  
UT 0515
  OSU_BLRqsos/J1254
  Clearer, at least for the moment, so we'll try.  Seeing 1".
  (Later):  Sure enough, just as we started the quasar, the transparency
  declined and the flux in the guide star decreased.   
  
                     Image numbers
                  mods1b        mods1r
  J1254Tel        34-36         42-44
  J1254           37-39         48-50

UT 0630
  OSU_BLRqsos/J1453
  Transparency is moderate to poor, so we did this one twice:
  telluric - quasar - quasar - telluric
  Seeing remains good, 1" or better, but we're working through 0.5 to
  1 mag of clouds.
 
                     Image numbers
                  mods1b        mods1r
  J1453Tel        40-42         54-56
  J1453           43-48         60-65
  J1453Tel        49-51         69-71


UT 0910
  OSU_BLRqsos/J1558
  Transparency is better.
  Seeing 0.8".
 
                     Image numbers
                  mods1b        mods1r
  J1453Tel        52-54         75-77
  J1453           55-57         81-83
 


UT 1015
  ND_boks45906
  Acquisition was made a bit harder by the presence of the very bright star 
  near the designated guide star.
  Started science script at UT 1038.  Seeing 1.1-1.2" to start.
  Object is very faint in the continuum, but clearly has emission lines.
  It was relatively clear when we started, but transparency declined during 
  the sequence.

  blue images: 58-63     red images: 88-93

UT 1155
  BD332642