B4K Pattern Noise

Monday, June 7, 2021

Problem(s) Encountered:

After collecting calibration images, we noticed an odd noise source on the detector. It is a striped diamond pattern...

Prospero Writing Only Every Other File

Tuesday, June 1, 2021

Problem(s) Encountered:

Despite restarting prospero several times and changing filename, only every other exposure was recorded in the file...

Guide Probe Sticking(?)

Monday, May 31, 2021

Problem(s) Encountered:

CHaS and telescope performed well. We had nice weather throughout the night and collected some excellent data! We...

TCS cycling and mirror covers

Wednesday, March 10, 2021

Problem(s) Encountered:

The odd part of the night began with a steady stream of error messages in the galil status line on the TCS window....

Our tenuous air bag support system

Wednesday, November 11, 2020

Problem(s) Encountered:

Hard point #1 of the mirror support system glitched resulting in the other two hard points taking more load and the...

Dome Shutter Not Opening

Saturday, November 7, 2020

Problem(s) Encountered:

Tried to open the dome, but the shutter stopped opening about 25% through it's travel. I could close it, stop it,...

Guide Probe Focus Failure

Thursday, February 27, 2020

Problem(s) Encountered:

Guider focus would no longer change.


Problem traced to the guide probe motor mike,...

Dome Shutter Control Issues

Wednesday, February 26, 2020

Problem(s) Encountered:

The main shutter and dropout cannot be closed in the morning, after the observation.


Telescope Motion Failure(s)

Wednesday, February 19, 2020

Problem(s) Encountered:

When we began astronomical observations, we slewed to the nearest bright star and noticed that it had not been acquired.After...

Telescope Focus Issues (hardware?)

Wednesday, February 5, 2020

Problem(s) Encountered:

Focus got stuck again. Noticed it during evening twilight when I tried to run the focus4k prospero routine. No means...


2.4m Trouble Reports & Solutions

Recent trouble reports for the Hiltner 2.4m telescope.  Note that you may find it worthwhile to peruse the 2.4m reports as well in case your problem is instrument-related.

Scroll down for a link to the complete archives.

To open a simple and searchable database containing all archived trouble report solutions, click on the following links.  While there are individual links for each telescope, it is worthwhile to search both databases in the event that you experience trouble:

Hiltner 2.4m Trouble Report Database (2020Mar06)

McGraw-Hill 1.3m Trouble Report Database (2020Mar06)

Click Here for the Full Archive