MDM Observatory 2.4m Telescope Observing Report for 2013 Dec 23

Observer(s): Halpern, Eracleous
Institution(s): Columbia, Penn State

Instrument: Nellie Direct

Worked for 13 hours (all night)
Conditions were Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Beg: Seeing 1.2 arcsec, Clear, Winds Light & Variable
   Mid: Seeing 3. arcsec, Clear, Winds Light & Variable
   End: Seeing 1.6 arcsec, Clear, Winds Light & Variable

Observing Summary:

Nellie saturates at around 10,000 counts above bias.
Flats with 18,000 counts are useless and full of
strange structure. This means that either the gain
is set very high, or there is something not optimal
about the settings.  Other than that, exposures look
normal.

Has anyone else noticed this?  

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Submitted on 2013 Dec 24 [7:03:09]