MDM Observatory 2.4m Telescope Observing Report for 2012 Apr 15

Observer(s): Rebecca Santana
Institution(s): Ohio University

Instrument: R4K OSMOS

Worked for 8 hours (most of the night)
Conditions were Non-Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Beg: Seeing 1.18 arcsec, Cirrus, Winds Moderate
   Mid: Seeing 1.2 arcsec, Cirrus, Winds Moderate
   End: Seeing 0.9 arcsec, Cirrus, Winds Moderate

Observing Summary:

Humidity has been consistently above 50% the whole night, water vapor
and high cirrus clouds caused non photometric conditions.  Had the power
flicker twice in the night, everything stayed on, and I checked to make
sure none of the breakers had been flipped.  Around 23:00, a few of my
exposures ended up the same as had happened on 4/12, where it appeared
as if I had taken a 10 min zero.  I spend about an hour trying changing 
targets and trying to figure out what was going on before it sort of fixed
itself, continued with observations.  Also to note is that there has been
some odd shapes going around the aperture that don't match with a blocked
guide probe.

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Submitted on 2012 Apr 16 [4:45:33]