MDM Trouble Report for 2015 Apr 14

Telescope: 1.3m
Observer(s): Ryan Chornock (Ohio University)
Instrument: R4K

Problem(s) Encountered:

I don't know if this is the famous nodding issue, but I had some targets tonight where my images were trailed in the N-S direction.

/data/mcgraw/ab_rc.0058.fits is a good example in a short 60s exposure.
(Eric, I have it loaded up in the ds9 window on mdm13ws1.)

This happened for two targets, both of whom were at azimuths in the west, pointed into the wind.
I simply chose other targets to get around it.  All my other long exposures were OK.
For those targets where it happened, you could easily see it on the guide camera: the star was just oscillating up and down.

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Submitted on 2015 Apr 15 [7:04:37]