MDM Observatory 1.3m Telescope Observer's Report for 2001 May 30

Observer(s): Jules Halpern
Institution(s): Columbia U.

Instrument: Echelle CCD Direct

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 2.8 arcsec, Cirrus, Winds Calm
   Mid: Seeing 1.5 arcsec, Clear, Winds Calm
   End: Seeing 1.4 arcsec, Clear, Winds Light & Variable

Observing Summary:

Observed all night, mostly variable stars and NGC 6791.
Medium cirrus at the beginning of the night gave way to
clear skys in the second half of the night.  Light winds
near the end caused the telescope to shake for a while.

At one point, when observing in the southeast at airmass 1.65,
the 4  filter wheel refused to turn. Had to slew to zenith and
re-initialize the MIS.  It might be useful to check this out
during the day by moving the telescope to various extreme
positions and seeing if the wheel will turn.

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Submitted on 2001 May 31 [5:27:20]