MDM Observatory 2.4m Telescope Observing Report for 2013 Jun 01

Observer(s): Fausnaugh/Villanueva
Institution(s): OSU

Instrument: OSMOS

Worked for 8 hours (all night)
Conditions were Non-Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1.0 arcsec, Cirrus, Winds Calm
   Mid: Seeing 1.3 arcsec, Clear, Winds Calm
   End: Seeing 1.0 arcsec, Clear, Winds Calm

Observing Summary:

Night started with light cirrus clouds, improved over the night.
No major problems.

The air conditioning sensor behaved strangely during the day,
fluctuation between an ambient dome temp of 36 C and 46 C.
Although the mirror temperature consistently read ~10 degrees
lower than the ambient temperature, it is unclear how long the
air conditioning was on-- an error 'System Disabled-- sensors
malfunctioning' appeared.  We had found that the software was 
frozen at 1500 local time, but the fluctuating readings continued
after resetting the software.

After we opened and the ambient temperature dropped, the sensors
behaved reasonably.

The mirror was about 1 degree warmer than the ambient temperature
all night.  After checking the temperature readout, the mirror
temperature appears to be responsible for the degradation of seeing
during the last two nights.


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Submitted on 2013 Jun 2 [5:46:19]