MDM Observatory 2.4m Telescope Observing Report for 2019 Aug 27

Observer(s): Fesen
Institution(s): Dartmouth

Instrument: OSMOS/B

Worked for 9 hours (all night)
Conditions were Non-Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   Clouds all night.
   Beg: Seeing 0.85 arcsec, Cirrus, Winds Light & Variable
   Mid: Seeing 0.95 arcsec, Cirrus, Winds Calm
   End: Seeing 1.3 arcsec, Patchy Clouds, Winds Calm

Observing Summary:

Seeing was very good throughout much of the night. Eric's telescope
collimation work has paid off, yielding several 0.85 arcsec image 
taken in several different fields.

However, the problem from last night has persisted
(see Trouble Report). The problem is that Prospero/OSMOS images
look weak, i.e., they are missing much of the data. Images
look like short exposure (~10-20 sec) despite being much
longer (100 - 1200 s).
Found that rebooting the IE and restarting Prospero fixed the
problem as long as I didn't move the telescope (!?).

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Submitted on 2019 Aug 28 [6:17:55]