MDM Observatory 1.3m Telescope Observer's Report for 2004 Oct 29

Observer(s): Grogin & Wegner
Institution(s): JHU & Dartmouth

Instrument: Echelle

Worked for 7 hours (last half of the night)
Conditions were Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   High Humidity from 6PM until 11PM.
   Beg: Seeing 1.5 arcsec, Fog/Low Clouds, Winds Light & Variable
   Mid: Seeing 1.3 arcsec, Fog/Low Clouds, Winds Light & Variable
   End: Seeing 1.5 arcsec, Fog/Low Clouds, Winds Light & Variable

Observing Summary:

Clear night, seeing generally 1.5 .
High humidity at beginning, dropped after midnight.

Strange filter-independent halo on sky images 
early during the night; diagnosed as
camera ice-up & cured with nitrogen gas.


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Submitted on 2004 Oct 30 [7:31:39]