MDM Observatory 2.4m Telescope Observing Report for 2016 Feb 08

Observer(s): Sheffield
Institution(s): Columbia

Instrument: Echelle+Modspec

Worked for 10 hours (all night)
Conditions were Non-Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Beg: Cirrus, Winds Light & Variable
   Mid: Cirrus, Winds Light & Variable
   End: Cirrus, Winds Light & Variable

Observing Summary:

Cirrus present for most of the night.

While aligning the slit rotator with the slit angle on the TCS, 
the rotator angle suddenly switched to ~ -580 degrees; 
this happened at an angle of ~60 degrees. After rotating back, the
angle  corrected  itself.

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Submitted on 2016 Feb 9 [6:53:35]