MDM Observatory 2.4m Telescope Observing Report for 2015 Jul 01

Observer(s): Thorstensen & Alper
Institution(s): Dartmouth

Instrument: modspec + echelle CCD

Worked for 8 hours (all night)
Conditions were Non-Photometric most of the night.
No equipment or software problems were encountered.

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

Observing Summary:

There was a little cloud around all night, but it was miraculously
clear overall -- best night this run by far.  

A couple of minor glitches.  At start, after shutdown, the 
air bags hadn't come up to pressure, really; typing 'h3' fixed
the problem.  Also, instrument rotator had to be power-cycled
before it worked.  Finally, had to clear the dewar window
with dry N2 before starting (though to check before sunset),
but then, weirdly, had the dewar fog up around 2 AM even though
the RH was only in the 70s.  Never had that happen before --
simply re-purged and left a hose attached running very slowly.

Left the computers up since there appeared to be no danger of
lightning in the morning.

Thanks to everyone for a good run (under the circumstances!).



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Submitted on 2015 Jul 2 [8:37:11]