MDM Observatory 1.3m Telescope Observing Report for 2010 Dec 03

Observer(s): Skowron
Institution(s): OSU

Instrument: CCDS

Worked for 12 hours (all night)
Conditions were Overcast most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Clouds all night.
   Beg: Seeing 1.3 arcsec, Overcast, Winds Calm
   Mid: Seeing 1.6 arcsec, Cirrus, Winds Calm
   End: Seeing 1.2 arcsec, Overcast, Winds Calm

Observing Summary:

High clouds all the night long. With different intensity, 
and changing constantly during exposures. 
(Guider counts where changing by factor of 2-3 with 15 minute timescales)

Dewar of CCDS was not filled completely (at 6pm) which lead to high background 
and temperature of the detector going up from -109 to -57 until the 
dewar was filled up completely (9pm).

With high background the black spots on ccd appeared to be visible,
they vanished when background dropped.

I took observations of 3 agns and 2 standard stars, none of them was clear from 
the impact form the clouds passing by constantly.


------------------------------

Submitted on 2010 Dec 4 [6:03:12]