MDM Observatory 2.4m Telescope Observing Report for 2014 Nov 15

Observer(s): David Jaimes, Stephanie Douglas
Institution(s): Columbia University

Instrument: ModSpec/Echelle

Worked for 1.5 hours (off and on through the night)
Conditions were Mixed most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   High Humidity from 0230 until .
   Beg: Cirrus, Winds Light & Variable
   Mid: Cirrus, Winds Moderate
   End: Clear, Winds Light & Variable,  

Observing Summary:

We opened at sunset, but while we taking flats we noticed a 
strange pattern on our data. After consulting with Jules Halpern,
we determined that there was moisture on ModSpec's detector 
window. We attempted to clear the moisture using dry nitrogen, 
but it didn't actually improve much. Several hours later, after 
the humidity had gone up and come back down again, the moisture
was gone. We lost about 1.5 hours to diagnosing and attempting 
to fix this. 

The humidity came down briefly in the middle of the night. 
We were cautious about opening, and ended up getting about an 
hour on sky before the humidity rose again and we had to close. 
The seeing was pretty bad during this time. 

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Submitted on 2014 Nov 16 [4:06:19]