MDM Trouble Report for 2009 May 1

Telescope: 2.4m
Observer(s): Statler, Cotto-Figueroa (Ohio University)
Instrument: Direct/Echelle

Problem(s) Encountered:
We started seeing an intermittent banding pattern in images
taken in the last part of the night. This appears to be an
abrupt change in the bias level happening during readout. We've
seen this general sort of thing for years, but not at this
severity. We're concerned that it's a worsening trend. We left
an example of one of these images on the display on Hiltner.

------------------------------

Submitted on 2009 May 1 [5:40:15]