MDM Observatory 2.4m Telescope Observing Report for 2012 Feb 14

Observer(s): Fesen and Milisavljevic
Institution(s): Dartmouth and Harvard

Instrument: OSMOS

Worked for 3 hours (off and on through the night)
Conditions were Non-Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Patchy Clouds, Winds Calm
   Mid: Cirrus, Winds Calm
   End: Seeing 0.9 arcsec, Clear, Winds Light & Variable

Observing Summary:

Humidity was 80%+ most of the night but dropped below 85%
soon after sunset and from 3-6 am. Humidity rose quickly (<10 min)
from 83% to 95%+ during the middle of the night which appears
to have caused condensation on the instrument and/or detector
window. Blew dry N2 into instrument for 20 minutes which 
seems to have removed most but not all of the frost.
Obtained spectra of two CCSNe.

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Submitted on 2012 Feb 15 [6:40:38]