MDM Trouble Report for 2024 Mar 27

Telescope: 2.4m
Observer(s): Nunez, Lawsky (Columbia)
Instrument: OSMOS 4k

Problem(s) Encountered:
Twice during the night, when we took sky images for osctrtask, we noticed a large dark patch
at the left end of the image. We can see stars inside the dark patch, though. In any case,
It didn't affect our slit observations because we used the inner slit and so the dark patch
was at the opposite end of the image. 
Check images cscu.0034.fits and cscu.0054.fits as examples.

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Submitted on 2024 Mar 28 [4:19:22]