MDM Trouble Report for 2016 Dec 05

Telescope: 2.4m
Observer(s): Douglas, Nunez (Columbia Unviersity)
Instrument: ModSpec/Nellie

Problem(s) Encountered:
This time, the problem really does appear to be the ModSpec shutter.

We were able to take calibration data, but once we tried to go on 
sky an hour or so later, we couldn't get any signal. We troubleshot
using Jules's advice from last night - we could see stars on the 
slit-viewer, we tried every combination of the  open shutter  checkbox
and the open/close shutter button in OWL, we could hear the shutter 
clicking, we restarted OWL. We then tried power-cycling
the shutter control box, which also didn't work.

On Eric's advice, we shone a light into the ModSpec eyepiece and took
a quick exposure - this gave us signal, indicating that Nellie was 
still OK. We then unplugged the shutter control from the detector
electronics box and then switched the shutter to open manually. 
This still didn't work, and Eric said it would be best to wait 
until he could take the shutter out and investigate further during 
the day, so we closed down. 

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Submitted on 2016 Dec 6 [4:00:13]