MDM Trouble Report for 2013 May 30

Telescope: 1.3m
Observer(s): Dale Mudd (Ohio State)
Instrument: CCDS

Problem(s) Encountered:
There was some N-S nodding again tonight, but it was much more 
more intermittent and less severe than the previous two nights.  


The biggest issue tonight was, at about 1:30, the image readout 
showed a very strange pattern appear on the detector.  It looked 
to be some sort of splash or smear pattern.  I asked over at the 
2.4m and the observers there mentioned that they had heard tales 
of some sort of dewar leak causing similar problems at certain 
telescope angles.  Hoping that moving around would help, I tried 
pointing the telescope to a few different objects as well as 
zenith, but the pattern remained on all subsequent images, seeming 
to get a little worse as the night progressed.  I've left it up 
on the SOYO monitor for you to check- that's from a 300s 
exposure at zenith.

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Submitted on 2013 May 31 [3:58:07]