MDM Trouble Report for 2001 Feb 22

Telescope: 1.3m
Observer(s): Lepine, Zurek (Columbia)
Instrument: Mk III spectrograph

Problem(s) Encountered:
We observe an absorption through that runs along dispersion
axis affecting columns 161-165, suggesting there is a dust 
particle on the spectrograph slit. The feature first appeared 
on the last exposure of the night, and can be seen in all 
subsequent flatfields.

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Submitted on 2001 Feb 22 [7:06:22]