MDM Observatory 2.4m Telescope Observer's Report for 2006 Oct 20

Observer(s): Watson & Prieto
Institution(s): OSU

Instrument: CCDS and Retrocam

Worked for 10 hours (most of the night)
Conditions were Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Beg: Seeing 1.2 arcsec, Clear, Winds Calm
   Mid: Seeing 0.7 arcsec, Clear, Winds Calm
   End: Seeing 0.9 arcsec, Clear, Winds Calm

Observing Summary:

The weather was great all night, with sub-arcsecond seeing most 
of the night.  We started the night using the 50g/mm grating and 
CCDS.  We expected more counts on any given target than if we
were using the 150g/mm grating, but we found the opposite.  The
effect was so great that we could not observe SNe with the 
grating.  We switched to imaging and later switched back to 
the 150g/mm grating.  When initializing this grating
we had some centering problems.  Both these problems are 
described furter in the trouble report form.

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

Submitted on 2006 Oct 21 [6:17:11]