MDM Observatory 1.3m Telescope Observing Report for 2011 Jan 21

Observer(s): Jackie Faherty
Institution(s): American Museum of Natural History

Instrument: MKIII

Worked for 9 hours (all night)
Conditions were Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Beg: Seeing 1 arcsec, Clear, Winds Calm
   Mid: Seeing 1 arcsec, Clear, Winds Calm
   End: Seeing 1 arcsec, Clear, Winds Calm

Observing Summary:

The observing conditions were excellent.  Low humidity, calm winds, excellent seeing.

The temperature of the CCD at the start of the night was ~-95 degrees but prior to opening the dome rose to ~90 degrees
I filled the dewar and waited for it to stabilize.  I began observing but at ~8pm (3 hours after re-filling the dewar) the 
temperature rose to ~-89 (the agreed temperature with Bob which I would re-fill the dewar).

I did and the temperature dropped to -90.  I conttinuously checked the temperature and everything seemed ok
until ~4am.  I noticed at ~3am that the temperature was ~-92.  At 4am it had risen thirty degrees to -65 degrees.  I filled the 
dewar again and then waited ~45 minutes for the temperature to drop to ~-90 degrees.  It remained stable for the remainder of the 
night.  It had risen to ~-82 by the end.  I closed the dome at ~7am and filled the dewar. 



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Submitted on 2011 Jan 22 [7:09:11]