OSU/RC Queue Observing UTC 2011 Apr 22
(civil date 2011 Apr 21/22)
===============================================================================

Observer:
David Atlee (OSU), Kris Sellgren (OSU)

Observing Assistant: David Gonzalez-Huerta
Support Astronomer : Dave Thompson
Instrumentation    : John Morris

===========
Instrument:
===========

Lucifer

=========
 Summary:
=========

   The sky conditions were superb throughout the night, but the winds were 
   also high for most of the night.  We were unable to open in time to take
   sky flats.  We lost a total of 9 hours to wind and an additional 35
   minutes to a problem with the telescope encoders.

============
 Opening
============

   0045   Moving blind mask to storage
   0100   High winds prevent opening to do narrow band flats.
   0153   Sunset
   0730   Wind has remained high since before sunset.  Dave Thompson begins 
          taking LUCI flexure measurements with the optical sieve to take
          advantage of weather closure.
   0817   Winds have stabilized enough to open.

====================
 UM_ClaudiaScarlata
====================

   0830  Finished opening.  Moving telescope to target field.  Weather is
         clear, seeing about 1" in guider.
   0833  Beginning MOS acquisition.
   0840  N3.75 camera did not settle properly, leading to misaligned sky
         images.  Re-starting acquisition sequence.
   0848  Lost guide star, perhaps due to wind fighting dome motion
   0853  Unable to re-acquire guide star.  Attempting to re-point telescope.
         The symptoms of the problem resemble the encoder problem encountered
         last night.
   0910  Returning to target field and re-starting acquisition sequence
         with image #61.  Seeing is poor (~1.5" in guider).
   0922  Beginning spectroscopic observations.  
   0925  Target field too close to zenith to set grating tilt.  Aborting 
         observation.

=============
 UVa_H2IMG
=============
  NOTE:  Dave Thompson indicates that the narrow band BrG filter includes a
         probable photometric gradient across the field.  He can provide more
         information regarding magnitude and position dependence.  The H2
         filter has not yet been tested for this gradient.

   0929  Moving telescope to target field to begin BrG observation.
   0935  Began BrG observations.  Seeing 0.6" in BrG image.  Approximately 2"
         in guider.  First image is #64.
   0950  At some points in the dither sequence, thermal emission from the
         guide probe is visible on the chip (images #74-83).  It also 
         introduces scattered light near the center of the field in some
         cases.
   1013  Aborting BrG script at image #28 of 36 due to high winds.

  NOTE:  Given the subtantial fraction of the BrG filter that was completed, 
         we will consider that portion of the project to be complete.  We will
         return to this filter to obtain a small number of reference images 
         to compare with the flux standard when we conduct the H2
         observations.

=============
 Calibrations
=============
   1157  Beginning dark frame sequence.  Dark frames will include 120s normal
         mode integrations that were not included last night due to a
         scripting error.