MDM Observatory 2.4m Telescope Observer's Report for 2001 Jun 23

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

Instrument: modspec + echelle 

Worked for 9 hours (all night)
Conditions were Non-Photometric most of the night.
Problems were encountered, see the summary for details.

Seeing and Weather:
   Beg: Seeing 1 arcsec, Patchy Clouds, Winds Moderate
   Mid: Seeing 0.8 arcsec, Cirrus, Winds Light & Variable
   End: Seeing 1 arcsec, Clear, Winds Calm

Observing Summary:

Finally, a very good night!  Started out with some clouds,
reddened lightning in far distance (past Tucson) and 
occasional high cloud during night, but seeing was often
excellent.  CV period work and occasional ID work.
Problem: Went on generator early in night to insure against
power glitches (UPS not working), but after about 10 min of
operation the lights started pulsing with alarming amplitude
at about 3 Hz.  After more than a minute of this I went back
to line power and luckily had no problems with it.  Dome is
still a little sloppy but OK if you keep an eye on it.

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Submitted on 2001 Jun 24 [5:17:22]