MDM Observatory 2.4m Telescope Observer's Report for 2006 Oct 22

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

Instrument: CCDS and Retrocam

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

Seeing and Weather:
   Beg: Seeing 1.3 arcsec, Clear, Winds Calm
   Mid: Seeing 1.3 arcsec, Clear, Winds Calm
   End: Seeing 1.1 arcsec, Clear, Winds Calm

Observing Summary:

The weather was good again, not as good seeing as last night,
but still decent (~1.2 arcsec). We observed supernovae the 
first half of the night. At 3am (mst) we put the 50g/mm grating
to do more tests. We observed the spectrophotometric standard
Hiltner 600 at the zenith with a 2  and 8  slit, and with two 
order separating filters (370 and 450). The throughput of the 
grating seems to be low as before (this doesn't mean we were
expecting it to change, but its good to confirm the same 
result). If possible, Bob, could you please change the grating
back to 150g/mm ?. Also, its rather difficult to move the MIS 
hatch from open to closed. 

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Submitted on 2006 Oct 23 [6:14:10]