MDM Trouble Report for 2017 Jan 30

Telescope: 2.4m
Observer(s): Jessica Klusmeyer (MDM)
Instrument: OSMOSB4k

Problem(s) Encountered:
Dome would randomly jump ~180 during exposures, went out noted dome position
and reset encoders .  This worked however it needed to be repeated after about
two exposures.  


Really confused with what happened the rest of the night...


Had already taken spectra with no problems.
The guider computer was set up so screen had a box roughly where the guide star needed to be
in order for target to be in slit.    

Guide star did not show up and quick search nearby showed nothing. Tried to move around to different
guide stars but this did not work.  Reset MIS and tried again.  Thought this fixed the 
problem but on exposure could not locate target.  Tried cycling MIS one more time


Next guess was the telescope was in the wrong spot, double checked RA& Dec listed.  
Went to nearest brightest star and it was not there (had done this at start of the night with no problems)
Went to zenith and did TCS reboot, realigned with tilt sensors


Observed another target, everything worked fine


Next target up in rotator angle, target guider was not going to correct location again,  thought this was an issue with
the rotator angle (have had issue before) reset guider/MIS did not help
Moved rotator back and tried another target and believe it was the same problem as above


----
Double checked all RA & Dec were listed correctly and that inner slit was selected in Jskycal
And tracking rates/ rotator angle were correct
---

Not sure what happened tonight,  Went back and looked at images where I could not find target, found one , ran 
osctrtask, it asked for + 2500dx

Not sure what happened or why it failed so quickly after TCS reset



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Submitted on 2017 Jan 31 [7:49:46]