MDM Trouble Report for 2015 Jun 01

Telescope: 1.3m
Observer(s): Terndrup, Cannata, Hartman (OSU)
Instrument: Andor

Problem(s) Encountered:
Several mages showed oscillations in the N/S direction.  Telescope
was pointed at dec = -8, h.a. = +1. About half the images in
this position displayed an oscillation.  Most of the light
was in the central image, but there were many excursions N/S.
These images are not useable.  This is the first time we have
seen this on this run, though we suspected it might be happening
when - just once - we saw some position shift when pointing at
a bright star and using Andor in its RT ( movie ) mode.  I have
printed out an example of one of the affected images and left it
for Eric.

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Submitted on 2015 Jun 2 [1:41:18]