MDM Observatory 2.4m Telescope Observer's Report for 2005 Mar 20

Observer(s): John Thorstensen
Institution(s): Dartmouth

Instrument: Modspec + echelle CCD

Worked for 11 hours (all night)
Conditions were Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1 arcsec, Cirrus, Winds Moderate
   Mid: Seeing 1.5 arcsec, Clear, Winds Moderate
   End: Seeing 1.5 arcsec, Clear, Winds Moderate

Observing Summary:

A good night finally, some cirrus in first 1/3 but then clear
(with moon so one could tell).  Bright moon, seeing variable.
Humidity was worrisome for a while but receded.  

The humidity gauge on the A/C system reads about 8 pts higher
than the Davis weather gauge, which in turn is quite a bit higher
than WIYN's numbers on the web.  Of course WIYN is at a different
altitude but it was fairly breezy last night and the air was
reasonably well-mixed I believe.  

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Submitted on 2005 Mar 21 [6:28:51]