MDM Observatory 2.4m Telescope Observer's Report for 2007 Oct 11

Observer(s): Mangala Sharma and Tom Statler
Institution(s): Ohio University

Instrument: 8K CCD

Worked for 12 hours (all night)
Conditions were Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1.0 arcsec, Clear, Winds Calm
   Mid: Seeing 1.2 arcsec, Clear, Winds Calm
   End: Seeing 1.2 arcsec, Clear, Winds Calm

Observing Summary:

Observed galaxy groups and high-z clusters. Photometric night 
with pretty good transparency, reasonably good but slightly variable seeing.
Telescope and instrument behaved well. Chip No. 3 (on the north-east of
the mosaic) is still out of commission. 8K data sometimes show
multiply-reflected  ghost images ; bright stars not even in the
direct field of view contribute reflections.
One incidence of power fluctuation sometime around 3:30AM. Nothing
happened to the instruments; only the music system in the control room
shut off.
Tried to use Thorstensen's gs8k_2cams program (which he generously 
upgraded for us despite his busy schedule). We hope to work with
him some more to match up the program output to what we actually 
see on the guide cameras - both north and south.

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Submitted on 2007 Oct 12 [6:34:11]